How do you determine if an element is metal or non-metal?
Answers
Answer: If the outermost shell has 1–4 electrons, it is a metal.
If the outermost shell has 5–7 electrons, it is a non-metal.
Example - Carbon
atomic number - 6
electron configuration - 2,4
Meaning it has 4 electrons in its outer most shell which makes it a METAL.
Related Questions
Which one of these objects has potential energy ? Can someone plzzzz help me out!!!
Answers
because the energy is stored in an object
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)
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
kinetic energy is given as
2) when speed is 3 m/s
kinetic energy is given as
3) when speed is 4 m/s
kinetic energy is given as
4) when speed is 5 m/s
kinetic energy is given as
5) when speed is 6 m/s
kinetic energy is given as
Fill out the chart below with things about the lion and tarantula that make them predators. Think of at least one trait that they have in common!
just 2 examples for each! brainliest will be given. btw no chart
Answers
Answer:
the lion and the tarantula are both carnivores
the lion and the tarantula both live in hot dry places
Explanation:
-They are secondary consumers as well.
The image shows the gravitational effects of the moon (not shown) on the Earth (depicted here) and the resulting tides that form. Which statements are true about the gravitational force between the Earth and the moon? Select ALL that apply.
Responses
A The moon exerts equal gravitational force on all locations of the Earth
B The moon exerts a smaller gravitational force on Earth locations that are farther away
C The moon must be to the right of the Earth because gravity is an attractive force.
D The moon must be to the left of the Earth because gravity is a repulsive force.
E The moon exerts a greater gravitational force on the Earth than the sun does.
Answers
Answer: B
Explanation:
Brainliest please! (if im right)
Using a ruler, a straight trend line that comes as close as possible to the points was drawn and extended to day 40. How tall will the seedling be on day 40 according to your trend line model?
I will give Brainliest to the first who answers!
Responses
42 cm
32 cm
38 cm
34 cm
Answers
What happened when the two substances were combined together in the cup? (highlight one)
The substances changed into different substances.
The substances did not change into different substances.
I am not sure if the substances changed into different substances.
Explain your answer using evidence from the Sim.
Answers
Based on evidence from Sim, when two substances were combined they did not change into different substances.
Here the word Sim is used to describe the process simulation. Simulation is defined as when two substances combined they do not change into different substances.
They just combine together and form a new substance.
Let us understand it as the first substance is liquid and the second substance is solid then when we combine both of them they form a new mixture but do not change their property.
The mixture is still liquid but it also has some properties of solid substance.
For more details about Sim,
https://brainly.com/question/31764333
The substances did not change into different substances.
Based on the information provided in the question, there is no evidence or indication of any chemical reaction or change in the substances when they were combined in the cup. The question does not mention any observations or effects that would suggest a chemical transformation.
If there were a chemical reaction or change, it would typically be accompanied by observable signs such as color change, gas production, temperature change, or formation of a precipitate. However, since the question does not provide any evidence or observations of such changes, we can conclude that the substances did not undergo any chemical transformation when combined.
It is important to note that without additional information or details about the substances and their behavior, it is not possible to make definitive conclusions. However, based on the given information, the most reasonable conclusion is that the substances remained unchanged when combined in the cup.
To learn more about substances, here
https://brainly.com/question/13320535
#SPJ2
(1.) If at 100.0 mL solution contains 0.850 moles of a solute, what is the molarity ?
(2.) If the molarity of a solution is 12 M and the volume of the solution is 1.0 L, how many moles of solute does the solution contain ?
Answers
Answer:
See below
Explanation:
1) Moles / volume
.85 mole / .1 liter = 8.5 M
2) 12 moles are contained in one liter
.85 mole / .1 liter = 8.5 M
2) 12 moles are contained in one liter
Which statements describe chemical changes? Check all that apply.
a. The after-rain smell is produced by an interaction between rain and the oils released by plants.
b. A homemade volcano can be created by combining baking soda and vinegar. When it erupts, carbon dioxide gas is released.
c. Sheep are sheared for their wool. The wool is cleaned and twisted into yarn. The yarn is dyed and used to knit clothing.
d. The Statue of Liberty has turned green over time due to the reaction of copper with carbon dioxide and water.
e. Mosaic art is created by smashing colored glass tiles and rearranging them to form a picture or design.
Answers
Answer:
Its A B D.
Explanation:
its correct because someone i know has done the same question and got the the answer correct. Hope i helped (:
Answer:
A, B, D
Explanation:
A: The after-rain smell is produced by an interaction between rain and the oils released by plants.
B: A homemade volcano can be created by combining baking soda and vinegar. When it erupts, carbon dioxide gas is released.
D: The Statue of Liberty has turned green over time due to the reaction of copper with carbon dioxide and water.
I hop this helps!
WHOEVER ANSWERS FIRST GETS BRAINLIST
Answers
Simple and complex molecules are similar in that they both involve ____ atoms A water B simple C bonded D complex
Answers
Answer:
The answer is C.
Explanation:
Please give brainliest
Answer:
D
Explanation:
complex, in chemistry, a substance, either an ion or an electrically neutral molecule, formed by the union of simpler substances (as compounds or ions) and held together by forces that are chemical (i.e., dependent on specific properties of particular atomic structures) rather than physical.
..
1. Interpret the table. What is the main difference among carbohydrates?
*
2. Evaluate this sentence: Glucose is the most important carbohydrate on Earth.
*
3. Compare a cookie and a slice of whole wheat bread in terms of their ability to provide
energy for the body.
*
Answers
Answer: some carbohydrates have a short chain of glucose theses are often found in candy or chocolate bars but some also contain long food chain and helps to release the energy slower and steadier this source of carbohydrate can be found in rice or bread. It is highly recommended that if you are preparing for a short sprint then you should probably eat chocolate.
Glucose is known to be the most important carbohydrates partially because of its effects on functions of life. Glucose is essential for many causes such as photosynthesis, presence in blood sugar, major role in diabetes, manufacturing of candy and wine, and many other purposes.
A cookie provides a burst of energy, while also activating the reward centre of the brain. Whole wheat bread on the other hand releases energy slowly so you don't get hungry easily
What is an ellipse please help)
Answers
In mathematics, an ellipse is a plane curve surrounding two focal points, such that for all points on the curve, the sum of the two distances to the focal points is a constant. As such, it generalizes a circle, which is the special type of ellipse in which the two focal points are the same.
Maybe they might use that math thing for Science.
You overhear a friend saying, “Plastic is the worst thing that humans have ever invented.”
In four to five sentences, explain whether you agree or disagree with your friend’s statement. Be sure to include facts that show the range of impacts that plastic has on human society and the environment.
Answers
Answer:
i agree
Explanation:
plasic is one of the worst things humans have invented because, plastic is killing the earth. it is everywhere and it has no wear to go but into wildlifes natural area. its killing animals plants and even causing polution. so yes i agree plastic is yet again a horrid thing humans have created.
Answer for points and brainliest!! :)
What is one way these stems help these cactus plants survive?
A. They take energy from sunlight.
B. They take minerals from soil.
C. They hold the plant in the ground.
D. They make seeds for reproduction.
Answers
Answer:
B.
Explanation:
A cactus stores water in its stem, which allows it to survive and thrive in desert-like environments. Its stem is made up of thick, spongy tissue that helps to absorb and retain large amounts of water. This stored water is then used to keep the cactus hydrated during times of drought and heat.
1. Which of the following indicates the number of protons?
a)Atomic number
B)Element symbol
C)Mass number
D)Atomic mass
Answers
Answer:
a)Atomic number
Explanation:
Element symbol signifies the element. For eg, Na is sodium. Mass number is the sum of protons and neutrons of an atom of an element. Atomic mass is the molar mass of the given element. Finally, atomic number is unique to each element because it signifies the number of protons of that element. EACH ELEMENT has their UNIQUE number of protons. For eg, atomic number of hydrogen is 1 because it has 1 proton, NO OTHER ELEMENT HAS ATOMIC NUMBER 1 because NO OTHER ELEMENT HAS 1 proton.
How does fossil evidence support Wegener’s hypothesis of continental drift? *
A. Similar fossils found on far apart landmasses suggest that the continents were once a single landmass.
B. Fossil evidence suggests that the continents have always been in their current positions.
C. No similarities exist between fossils on different continents.
Plant and animal fossils show evidence of changes in Earth’s magnetism.
D. Plant and animal fossils show evidence of changes in Earth’s magnetism.
Answers
Answer:
A
Explanation:
What Factors determine surface Gravity?
Answers
Answer: Gravity depends on two main factors.
Explanation: Those factors are mass and distance. I hope this helps!
What is a phyiscal and chemical change
Answers
a chemical change occurs when one or more substances change into entirely new substances with different properties
Answer:
Physical change is when change occur physically in a substance. It is usually reversible. It includes change in colour, shape, texture, volume etc.
Examples: Cutting of paper, making moulded stuff from dough etc.
Chemical change is when change occurs chemically in a substance. It is non-reversible. When ever a physical change happens, a new substance if formed.
Examples: Burning of paper, transformation of milk into curd etc.
How is interpreting a skeleton in an owl pellet similar to and
different from interpreting a fossil of a skeleton?
Answers
Answer:
Explanation: interpreting a skelton means stopping what its doing. While interpreting a fossil causes it to be taken out of its decaying form
EXPLANATION:
1st- BONES
2nd: PREY
3rd: ENVIRONMENT
Ps. Hope this helped!
:)
There are 2 main types of _______. One is a _______, where electrons are shared between atoms. The other is an _______, where one atom loses an electron to become a _______ charged ion, and the other atom gains the elctron to become a _________ charged ion.
Answers
Hello..!
There are 2 main types of ions one is an atom where the electrons are shared between the atoms. the other is an electron where one atom loses an electron to become a neutral in a charged ion, and the other atom gains the electron to become a charged lon anion.
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Ions with a positive charge are known as cations. Those that are negatively charged are called anions.
¿Doubts? in the comments Greetings.
The two main types of bonds formed between atoms are ionic bonds and covalent bonds. An ionic bond is formed when one atom accepts or donates one or more of its valence electrons to another atom. A covalent bond is formed when atoms share valence electrons.
I NEED HELP ASAP PLZZZZ
Answers
Answer: 2 :)
Explanation:
I took the test
Please help me por favor :'(
Answers
Please help me I will give you the brain thing and extra points.
image below
Answers
Answer:
b
Explanation:
How to work out the relative mass of potassium? What is the calculation? ( explained very easily )
Answers
Answer:
39
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.
———————————
(1/12)th Mass of one C12 atom
1. Using D10W and a vial of NaCl 4 mEq/mL, how many mL of NaCl are needed to prepare 250 mL of a
D10/NS solution?
a. 4.8mL
b. 9.6ml
c. 19.6mL
d. 154mL
Answers
To prepare 250 mL of a D10/NS solution using D10W and a vial of NaCl 4 mEq/mL, you would need 9.6 mL of NaCl. Normal saline (NS) contains 154 mEq/L of sodium chloride (NaCl). To prepare 250 mL of NS, you would need 250 mL * (154 mEq/L) = 38500 mEq of NaCl. Since the vial of NaCl contains 4 mEq/mL, you would need 38500 mEq / (4 mEq/mL) = 9625 mL = 9.6 mL of NaCl. So the correct answer is b. 9.6ml.
Element X has a nucleon (mass) number of 19 and a proton (atomic) number of 9. Which group does X belong in? Choose one of the following and explain the answer.
a) I b) III c) VII d) 0
Answers
Answer:
C
Explanation:
Flourine has
9 protons
9 electrons
10 neutrons
this makes the atomic number 9 and the atomic weight 19.
hope it helps
1. List regions experiencing high pressure.
2. Based on the weather shown in Florida, is Florida experiencing high or low
pressure? How would you indicate this on the map above?
3. What kind of front is the South experiencing?
4. Based on this information, what kind of weather do you think the southern part of
the United States is experiencing?
#5. What does this mean about the current weather conditions in Florida?
#6. What does this mean about the current weather conditions in the state of Washington?
Answers
Answer:
its the big c
Explanation:
plz download the doc and answer its due in 20 mins like bro wth
Answers
Answer:
and how do we know this is not a virus
Explanation:
sorry dude im just saying
Answer:
I agree with the comment above
sorry
Explanation:
It's due in 9 mins.. who ever waste my coins will get reported
What happens to air when it is heated by the sun?
water vapor changes to liquid
it rains
it descends
it rises
Answers
Answer:
D. It rises
Explanation:
Heat energy is released when the sun comes in to contact with the air. It then gets pushed into the atmosphere which creates a bubble of air that is warmer, causing that bubble to rise.
the arrows in the diagram below show the circulation of air on a sunny day. based on this diagram, what type of local wind would occur?
A. a sea breeze because of the warm air from the land rises and the cool air from the water comes in.
B. a sea breeze because of the warm air from the water rises and cool air from the land comes in.
C. a land breeze because the warm air from the water rises and the cool air from the land comes in.
D. a land breeze because the warm air from the land rises and the cool air from the water comes in.
Answers
Answer:
A
Explanation:
Sea breeze because the warm land air rises and the cool sea air come in