Please Help!! How are physical and chemical changes verified by the atomic theory?

Answers

Answer 1

Explanation:

The atomic theory is a scientific model that explains the behavior of matter in terms of the behavior of atoms and molecules. According to this theory, all matter is made up of tiny, indivisible particles called atoms. Physical and chemical changes in matter are explained by changes in the arrangement and interactions of these atoms.

Physical changes involve a change in the physical state or appearance of matter, without a change in its chemical composition. Examples include changes in temperature, pressure, or state (e.g. solid, liquid, gas). These changes can be explained by the atomic theory in terms of the movement and arrangement of atoms and molecules. For example, the melting of ice involves the absorption of energy by water molecules, which causes them to move faster and break their bonds with the ice molecules.

Chemical changes involve a change in the chemical composition of matter, resulting in the formation of new substances with different properties. Examples include reactions between acids and bases, combustion reactions, and oxidation-reduction reactions. These changes can also be explained by the atomic theory in terms of the rearrangement of atoms and molecules. For example, the reaction between hydrochloric acid and sodium hydroxide involves the exchange of hydrogen and sodium ions, resulting in the formation of water and sodium chloride.

In summary, the atomic theory provides a framework for understanding physical and chemical changes in matter by explaining them in terms of the behavior of atoms and molecules. Verification of physical and chemical changes can be achieved through experiments and observations that demonstrate changes in the properties and behavior of matter, consistent with the predictions of the atomic theory.

Answer 2

Answer:

The atomic theory explains how physical and chemical changes occur at the atomic level. The theory explains that all matter is made up of atoms and molecules, which are constantly in motion.

Physical changes involve a change in the physical properties of matter, but no change in the fundamental nature of the substance. For example, when water freezes, it changes from a liquid to a solid, but the molecules remain the same. Chemical changes involve a change in the fundamental nature of the substance, where new molecules are formed. The atomic theory helps explain these changes by showing how atoms and molecules interact during chemical reactions. By analyzing the atomic and molecular structure of matter before and after a change, scientists can verify whether a physical or chemical change has occurred.

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Related Questions

what is the hairlike structures on the outside of a cell

Answers

it’s the Flagella! hope this helps!

Flagella (singular = flagellum) are long, hair-like structures that extend from the plasma membrane and are used to move an entire cell, (for example, sperm, Euglena). When present, the cell has just one flagellum or a few flagella.

PLEASE ANSWER QUICKLY!!!!! Which of the following is NOT a function of your integumentary system?

A) Protecting against infection
B) Synthesizing vitamin D
C) Maintaining Fluid Balance
D) Stabilizing blood pressure

Answers

Answer: Must be a trick question.

Explanation: All of these are a function of the integumentary system.

The correct answer is B. Synthesizing virtual d.
Hope this helps <3

Which of the following has the greatest influence on the size and force of waves?
A.
seasons
B.
Moon’s gravity
C.
wind speed
D.
Earth’s gravity

Answers

wind speed bc The faster the wind, the longer it blows, or the farther it can blow uninterrupted, the bigger the waves.

c. wind speeds

i need 20 soooo

WHOEVER ANSWERS FIRST GETS BRAINLIST

Answers

The second option! Plant A has more to an B

Katrina is investigating the properties of volume for the different states of matter. First, she places a cube in a bowl of water and observes what happens. Next, she takes the cube out of the water and pours the water into a glass. Which statement describes the observations Katrina made of the cube and the water?

A: When the cube was placed in the water, the shape of the cube stays the same. When the liquid was poured from the bowl into the glass, the shape changed.

B: When the cube was placed in the water, the volume of the cube changed. When the liquid was poured from the bowl, the shape changed.

C: The volume of the cube and the water changed when the cube was placed into the water. The volume of the liquid changed when it was poured out of the bowl.

D: The shape and volume of the cube and the liquid changed when the cube was placed in the bowl. The liquid stayed the same when it was poured from the bowl.

Answers

The answer would be

B: When the cube was placed in the water, the volume of the cube changed. When the liquid was poured from the bowl, the shape changed.

Hope this helps

B when the cube was placed in the water volume

i really need help!! im struggling with my science notes.

what is the fomula to find force?
what is the formula to find mass?
what is the formula to find acceleration?

please help these are due really soon!!

Answers

Answer:

formula for force : F=m times a

formula for mass: density times volume

formula for acceleration: change in velocity over the change in time

Explanation:

Answer:

It is summarized by the equation: Force (N) = mass (kg) × acceleration (m/s²)

Explanation:

The type of radioactive decay in which the mass number and atomic number remain unchanged is (2 points) Select one: a. beta radiation. b. alpha radiation. c. positron radiation. d. gamma radiation.

Answers

Answer:

Explanation:

a. beta radiation - electrons that have negative charge, and when they leave a nucleus , the charge or atomic number of the nucleus will change.

b. Alpha radiation - nuclei of He, atomic number and mass number will be changed.

c. positron radiation - positrons are similar to electrons but have positive charge, so , the charge or atomic number of the nucleus will change.

d. gamma radiation is electromagnetic waves, does not have charge and mass.

Answer:

the answer is d. gamma radiation

Explanation:

Please write an introduction for a SHE task of Fire-Stick Farming.

Answers

Aboriginal people systematically burnt vegetation to reduce fuel and encourage new growth to lure grazing animals for hunting.

Fire stick Managing the environment through farming Aboriginal people routinely burned grass to minimise fuel and promote new growth in order to attract grazing animals for hunting.

Why is farming important?

Among the various ways that agriculture has an impact on society are the provision of food, habitat, and employment opportunities; the provision of raw materials for food and other goods; and the development of robust economies through commerce.

Why is farming beneficial to the environment?

A large number of species use pasture and crops as both a habitat and a source of food, making up around 50% of the planet's livable land. Sustainable management of agricultural operations has the potential to safeguard watersheds, restore significant habitats, and improve the quality of the soil and water supply.

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Why are cellular respiration and photosynthesis opposite processes?
This is in science for 7th grade

Answers

Answer:

photosynthesis removes carbon dioxide from the atmosphere while respiration puts back carbon dioxide.

Explanation:

hope this helps

photosynthesis is when she jabs so j she so ab and cellular respiration is also when you’d h.

HELP IMPORTANT TEST!! Why must animals eat food but plants do not eat food? A: Plants do not appear to eat, but they do actually eat nutrients in the soil. Animals must eat to obtain food that they can't get from the soil. B:Plants make their own food through photosynthesis. Animals must eat because they cannot make their own food. C: Plants use photosynthesis to make their own food instead of eating. Animals eat plants because they like the taste of certain fruits. B: Plants make their own food through photosynthesis, so they do not eat. Animals eat because the energy they make themselves is enough to live but not grow. By eating, they can grow big and strong.

Answers

Answer:B

Explanation:The answer is B because plants use photosynthesis to make their own food while animals such as humans do not make their own food using the sun photosynthesis is using the suns Energy to produce your own food If you think about it humans are animals and do you use the suns energy to produce your own food no

Besides plants, what are examples of other organisms that use photosynthesis?

Answers

Answwer:

Algae, Euglena, and Bacteria do.

1. List at least two ways that you and your family currently limit the amount of energy that you use.

2. Then list at least five ways that you might further reduce your energy usage, even if it means some personal sacrifices.

Answers

Answer:

1. Turns lights off when not being actively used, and unplug devices, even when being turned off just being plugged in still drains electricity!!

2. Limit the use of electronic devices, limit the use of lighting unless necessary(?), Limit use of charging devices; meaning maybe don't leave them plugged in constantly, Limit amount of devices and/or devices used during a period of time.

Explanation:

describes a type of reaction in which negative ions in two compounds switch places , forming two new compounds

Answers

Answer:

A double displacement reaction or double replacement reaction.

Explanation:

Answer:

double replacement reaction i think

Explanation:

Water can take on three forms which include ice, water, and water vapor. Which states of matter match these three forms of water?
Need answer asap!!!

Answers

Ice is a solid. Water is a liquid. Water vapor is a gas.

Explain how the following experiment shows the direction that gravity pulls an object, specifically showing that it does not pull an object parallel to the ground.

A rubber ball is dropped from the top of a ladder. It bounces on the same spot several times, each time to a lesser height than the previous bounce, before coming to rest in place.

Answers

Answer:that cant happen it get smaller ever bounce it docent get higher the first bounce it the highest.

Explanation:

How does an atom change if all of its electrons are removed?
p.s. I'll mark the first answer the brainliest if it is correct! ;)

a. The atom’s volume increases.

b. The atom’s mass increases.

c. The atom becomes positively charged.

d. The atom becomes negatively charged.

Answers

c. The atom becomes positively charged

if the electrons are removed it means theres no longer a negative charge to balance the positive charge of the protons in the atom

C the atom becomes positively charged

How to work out the relative mass of potassium? What is the calculation? ( explained very easily )

Answers

Answer:

Explanation:

Relative mass does not need to be calculated as it is listed on the periodic table. Potassium's relative atomic mass is around 39.

Relative Atomic Mass = Mass of one atom
———————————
(1/12)th Mass of one C12 atom

Name and Title:

Include your name, instructor's name, date, and name of lab.

Objectives(s):

In your own words, what is the purpose of this lab?

Hypothesis:

In this section, please include the predictions you developed during your lab activity. These statements reflect your predicted outcomes for the experiment.

Procedure:

The materials and procedures are listed in your virtual lab. You do not need to repeat them here. However, you should note if you experienced any errors or other factors that might affect your outcome. Using your summary questions at the end of your virtual lab activity, please clearly define the dependent and independent variables of the experiment.

Data:

Record the elements present in each unknown astronomical object. Be sure to indicate “yes” or “no” for each element.

Hydrogen Helium Lithium Sodium Carbon Nitrogen
Moon One

Moon Two

Planet One

Planet Two

Conclusion:

Your conclusion will include a summary of the lab results and an interpretation of the results. Please answer all questions in complete sentences using your own words.

Using two to three sentences, summarize what you investigated and observed in this lab.
Astronomers use a wide variety of technology to explore space and the electromagnetic spectrum; why do you believe it is essential to use many types of equipment when studying space?
If carbon was the most common element found in the moons and planets, what element is missing that would make them similar to Earth? Explain why. (Hint: Think about the carbon cycle.)
We know that the electromagnetic spectrum uses wavelengths and frequencies to determine a lot about outer space. How does it help us find out the make-up of stars?
Why might it be useful to determine the elements that a planet or moon is made up of?

Answers

this seems like a class project

i support that frfr

PLEASE HELP ILL MARK U BRAINLIEST!

A _________________________________ is a solid, naturally formed substance that always has the same
composition and the same properties

Answers

A crystal
A solid, naturally formed substance that always has the same composition and same properties

Answer: A rock

I don't know what to put here.

What is Waves? how does it form?

Answers

Answer:

Give me brainliest plz

Explanation:

The arrangement of things in the order that they occurred.

A. Extinction
B. chronological order

Science (Ignore chemistry subject pls)

Answers

The answer is B: chronological order

It’s B chronological order

Calculate Rations. A transformer has ten turns of wire on the input side and 50 turns of wire on the output side. if the input voltage is 120 V, what will the output voltage be?

Answers

Answer:

Output voltage = 600 V

Explanation:

Using the transformer equation which simply states that the ratio of the secondary to primary voltages in a transformer equals the ratio of the number of loops in their coils.

Number of input turns/Number of output turns = Voltage of input/voltage of output

10/50 = 120V/voltage of output

Voltage of output = 120 V/0.2

Voltage of output = 600 V

lan wonders if sunscreen lotion will dry out if it is exposed to light. The table below shows what happens when different types of light hit the sunscreen
Based on this information, which type of light is more likely to dry out the sunscreen?

a
The ultraviolet light is more likely to dry out the sunscreen because the ultraviolet light bounces off of the sunscreen, which means that it has more energy.

b
The X-ray light is more likely to dry out the sunscreen because the X-ray light can pull energy out of the sunscreen when it passes through the sunscreen.

c
There is no way to know because they are two different types of light, and different types of light can change material in different ways.

d
Neither type of light is likely to dry out the sunscreen because the sunscreen does not take in energy from either the ultraviolet light or the X-ray light.

Answers

D. I hope this helps with what your doing

Sunscreen does not absorb any kind of light especially ultraviolet light and x-rays. They protect skin from these lights. Hence option D is correct.

What is sunscreen?

Sunscreen lotion is a chemical which is used to protect skin from hazardous lights. Sunlight consists of ultraviolet light and X-rays which causes damages to skin. They even damage the DNA of humans.

Sunscreen is made of some nanoparticle formulation. They are capable of screening the skin from the hazardous light. The nanoparticles in the lotion will enter the cell without causing any toxicity and will form a protective coating around the nucleus.

Therefore, either type of light is likely to dry out the sunscreen because the sunscreen does not take in energy from either the ultraviolet light or the X-ray light. Hence, option D is correct.

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Research gestation and mating. Find out three other mammals' gestation periods and mating rituals. How long is the gestation period, how do the mates court each other, and do they mate for life? What are some other interesting facts? Choose any three mammals you are interested in and use any sources you like. Write a three-paragraph essay comparing the gestation period of the three animals.

For an extra challenge, see if you can find out if any mammal has a shorter gestation period than mice or a longer one than Asian elephants.

Answers

Answer:

hold on i will help you soon

The period of time when sexual intercourse takes place between two organisms is called mating. However, all the matings need not end in fertilization.

The gestation period is a time when the embryo develops completely into a fetus. This is usually from the time of fertilization to the time of giving birth.

Let us take the comparison of the gestation period of 3 mammals.

The gestation period of a cow varies from 279- 287 days. The mating between the bull and cow occurs during the heat or oestrus period of the cow. At that time the bull mounts on the cow or vice-versa may happen during the mating period. This is termed bulling.

In the case of horses, the gestation period is 320-380days. The mating ritual in a horse is a bit different than in a cow. It usually has three phases of sexual behavior which includes: courtship, mating, and post mating behavior. During courtship, the stallion which is the male horse will approach the mare, prance, sniff her, nuzzle her, and groom her. The mare which is the female horse may squeal, kick, or move away to show the stallion that she is not ready. When the mare is receptive to breeding, she may stand still, deviate her tail, and urinate, leading the stallion to mount her. It usually breeds well in pastures than in controlled environmental breeding conditions.

Whereas in camels, the gestation period is far longer than in cows and horses. It is about 360-440days. The male camel displays its organ called a dulla to show out is ready for mating. The male camel Urinates on its own tail and swishes it over its back so that the Urine contains female-attracting pheromones. It shows distinct violent behavior towards other male camels. The female camel undergoes an estrous cycle in the breeding season which lasts receptive for 3-4 days, and non-receptive following the other 10 days. In the receptive period, the camel sits down and exposes its genitalia for the male camel to copulate. The whole mating takes about 20 minutes and is accompanied by gurgling and frothing by the male and bleating by the females.

It should be noted that African elephants have longer gestation periods like Asian elephants whereas no other animal has a longer gestation period than an elephant or a shorter gestation period than mice.

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When the speed of the bottle is 2 m/s, the KE is kg m2/s2. When the speed of the bottle is 3 m/s, the KE is kg m2/s2. When the speed of the bottle is 4 m/s, the KE is kg m2/s2. When the speed of the bottle is 5 m/s, the KE is kg m2/s2. When the speed of the bottle is 6 m/s, the KE is kg m2/s2.
instructions
In this part of the experiment, you will be changing the speed of the bottle by dropping it from different heights. You will use the same mass, 0.250 kg, for each trial, so record this mass in Table B for each velocity. Then, calculate the expected kinetic energy (KE) at each velocity. Use the formula KE = mv2,
where m is the mass and v is the speed. Record your calculations in Table B of your Student Guide.

Answers

Answer:

Based on the given instructions, you need to calculate the expected kinetic energy (KE) at each velocity using the formula KE = mv^2, where m is the mass and v is the speed. The mass is given as 0.250 kg.

Table B: Calculation of Kinetic Energy (KE)

Speed (m/s)Mass (kg)KE (kg m^2/s^2)20.2500.50030.2500.75040.2501.00050.2501.25060.2501.500

To calculate the kinetic energy at each velocity, multiply the mass (0.250 kg) by the square of the velocity.

For example, when the speed of the bottle is 2 m/s: KE = (0.250 kg) * (2 m/s)^2 = 0.250 kg * 4 m^2/s^2 = 1.000 kg m^2/s^2

Perform similar calculations for the other velocities and record the results in Table B.

Answer:

Explanation:mass of the bottle in each case is M = 0.250 kg

now as per given speeds we can use the formula of kinetic energy to find it

1) when speed is 2 m/s