How does the atomic radius change across a period of the periodic table?

a) Melting: An example of melting that occurs in our everyday life is when we heat butter on a stovetop.

b) Freezing: Freezing is the process in which a liquid transforms into a solid upon cooling.

c) Condensation: One example of condensation that we encounter regularly is when water droplets form on the surface of a cold drink on a hot day.

d) Evaporation: Evaporation is the process by which a liquid transforms into a gas or vapor.

e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state.

a) Melting:  Butter is a solid at room temperature, but when heat is applied, it melts into a liquid. This change is a result of the increase in temperature, which provides enough energy to overcome the intermolecular forces holding the butter molecules together.

b) Freezing:Eventually, the temperature reaches the freezing point of water (0°C or 32°F), at which the water molecules slow down and arrange themselves into a regular, crystalline structure. This transformation from a liquid to a solid state is accompanied by the release of heat energy.

c) Condensation: As the temperature decreases, the air's capacity to hold moisture decreases, causing the water vapor in the air to condense into liquid water droplets. This process occurs due to the transfer of heat energy from the warm air to the cold surface, leading to the saturation of the air and the conversion of water vapor into liquid form.

d) Evaporation:  As the sun's heat energy is absorbed by the water molecules on the clothes' surface, their kinetic energy increases, causing them to break free from the liquid phase and escape into the surrounding air as water vapor. This process occurs because the molecules at the liquid surface with sufficient energy can overcome the attractive forces within the liquid and enter the gas phase.

e) Sublimation: Sublimation refers to the transformation of a substance directly from a solid to a gas without passing through the liquid state. An example of sublimation is the process of dry ice (solid carbon dioxide) converting into carbon dioxide gas.

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An acid and a base will react in a neutralization reaction, which produces water and salt as a result of the interaction of H+ and OH- ions. A pH of 7 results from the neutralization of two powerful acids and bases.

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The relation between half-life and rate at which it is decaying is given by

t(1/2) = log2/rate

now in the above problem half-life is given as 1459 years substituting in the above equation we get the value of rate at which it is decaying to be rate=0.0001075.

The amount of substance that is present after t years given that the half-life of the substance is h is calculated through the equation,

A(t) = A(o)(0.5^t/h)

The 1/2-life of a radioactive isotope is the quantity of time it takes for one-1/2 of the radioactive isotope to decay. The half of-existence of a selected radioactive isotope is consistent; it's miles unaffected by using situations and is independent of the initial quantity of that isotope.

1/2-life (symbol t1⁄2) is the time required for an amount (of substance) to reduce to half of its initial price. The time period is commonly utilized in nuclear physics to explain how speedy volatile atoms undergo radioactive decay or how long strong atoms survive.

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Battery device in a circuit which supplies voltage. Battery is a electrical component which converts chemical energy into electrical energy using the process electrochemical oxidation-reduction reaction. Voltage is also called as potential difference which means the difference between two electropotentials of battery.

Resistor  is a electronic component which offer resistance in the circuit. Resistor main purpose which opposes current flow in the circuit. Resistor are available in two categories linear resistors(metal oxide resistor ,potentiometer) and non linear resistors (photo resistor and thermistor)

The above two electronic components are played important keyrole in electronic circuit.

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Colorimetric methods of analysis make use of Color changes in reagents to decipher the concentration of solutions.

Therefore, color completes the sentence

Generally, Colorimetric analysis is used to know the concentration of a chemical element in a solution while using colour indicators or reagents.

Therefore

Colorimetric methods of analysis are based on having a reagent that changes Color as a function of the concentration of the analyte.

Color

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Protons (H⁺) are pumped across the inner mitochondrial membrane as part of the process called electron transport chain, which is an essential step in cellular respiration.

The electron transport chain is responsible for generating adenosine triphosphate (ATP), the main energy currency of cells.

During cellular respiration, electrons are transferred from high-energy molecules (such as glucose) through a series of electron carriers embedded in the inner mitochondrial membrane. As electrons pass through the electron transport chain, energy is released and used to pump protons (H⁺) from the mitochondrial matrix to the intermembrane space.

There are some several reasons;

Establishing an Electrochemical Gradient; The pumping of protons across the inner mitochondrial membrane creates an imbalance of protons, resulting in a higher concentration of protons in the intermembrane space compared to the matrix.

Generation of ATP; The electrochemical gradient created by the proton pumping is utilized by ATP synthase, an enzyme complex embedded in the inner mitochondrial membrane.

Coupling Electron Transport with Proton Pumping; The pumping of protons across the inner mitochondrial membrane is coupled with the flow of electrons through the electron transport chain.

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Answer:

Methane -1,Ethene 2 , Ethane 2,Pentane 5,Propene 3,Hexane 6,Ethyne 2,Propane 3,Octane 8,Heptane 7 Decane 10,Butyne 4,Butane 4,Propyne 3,Butene 4

Answer:

Methane: 1

Ethane: 2

Ethene: 2

Pentane: 5

Propene: 3

Hexane: 6

Ethyne: 2

Propane: 3

Hexane: 7

Octane: 8

Decane: 10

Butyne: 4

Butane: 4

Propyne: 3

Butene: 4

Explanation:

Use the chemical formula of the compounds:

Methane ⇒ \(CO_4\)             Hexane ⇒ \(C_6H_14\)        Decane ⇒  \(C_10H_22\)

Ethane ⇒ \(C_2H_6\)                Ethyne ⇒ \(C_2H_2\)          Butyne ⇒ \(C_4H_6\)

Ethene ⇒ \(C_2H_4\)             Propane ⇒ \(C_3H_8\)         Butane ⇒ \(C_4H_10\)

Pentane ⇒ \(C_5H_12\)             Hexane ⇒ \(C_7H_16\)      Propyne ⇒ \(C_3H_4\)

Propene ⇒ \(C_3H_6\)           Octane ⇒ \(C_8H_18\)            Butene ⇒ \(C_4H_8\)

In the chemical formulas above, each formula has things known as coefficients (elements) and subscripts (atoms).

So to further explain, take methane as an example, there is a "C" at the beginning. C is capital as it is a pure substance and is a element. This also means there is 1 carbon atom in methane while there is 4 oxygen atoms. But to explain further, let's review definitions:

A pure substance composed of two or more elements composed of two or more elements.

A pure substance is a single element or compound, not mixed with any other substance

One of a class of substances that cannot be separated into simpler substances by chemical means.

A chemical formula that indicates the kinds of atoms and the number of each kind in a molecule of a compound.

So after reviewing let's find the carbon atoms.

The subscripts in each chemical formula that are to the right to the "C" are the amount of carbon atoms. If a capital letter does not have a subscript, it is assumed to have 1 atom only.

Your answers can be found above.

Answer:

allylcyclopentane.

it may have other names but this is the most oniwn for this compound

Answer:

Preparation of Bases

By the direct union of a metal with oxygen Some metals when heated in air or oxygen form the oxides of the metals. ... By the action of water or steam on some active metals Some active metals like sodium and potassium react with cold water to form hydroxides with the evolution of hydrogen gas.

A glow stick will glow longer at lower temperatures than at room temperature, one can infer from the observation. Temperature and reaction time are the test variables.

We notice in this reaction that a glow stick stored in the freezer lights for a longer period of time than a glow stick stored at normal temperature. This implies that temperature affects how long a response lasts.

The most straightforward explanation for this observation is that glow sticks glow longer in colder temperatures than they do at room temperature; as a result, glow sticks kept in the freezer are observed to glow longer than glow sticks kept at room temperature.

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Answer:a mouse

Explanation:

Answer: a mouse

Explanation:

The number of valence electrons in each of the atoms are;

B - 3

Al - 3

Cl - 7

Ne - 8

We define an atom as the smallest part of a substance that can take part in a chemical reaction. We know that when we begin to break down the elements that the atoms can be found in the element and there are sub atomic particles that can also be found inside the atom of the element.

The electrons that are found at the last shell or the outermost shell of the atom are the ones that we call the valence electrons that can be found in the atom.

The electronic configuration of boron is \(1s^2 2s^2 2p^1\) (the n =2 level is the valence shell)

The electronic configuration of Al is \(1s^2 2s^2 2p^6 3s^2 3p^1\)( the n= 3level is the valence shell)

The electron configuration of Cl is \(1s^2 2s^2 sp^6 3s^23p^5\) ( the n= 3level is the valence shell)

The electron configuration of Ne is \(1s^2 2s^2 2p^6\) (the n =2 level is the valence shell)

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Answer:

A protein is a polymer that is made of amino acids.

Answer:

d. Bar graph

Explanation:

a. Line graph  - this type of graph is best for continuous data, such as how a the sales of a particular cereal drop over time

b. Pie chart  - this is best for % data, such as looking at the % of different nutrients (carbohydrates, fats, proteins) in a cereal

C. Stem-and-leaf plot  - presents quantitative data such as the ages of people who buy a brand of cereal

d. Bar graph - this is best for plotting different numbers in distinct categories to compare them to one another  

Answer:

Definition of Genetic Material

Well, your genetic material known as deoxyribonucleic acid (DNA) is the reason. DNA is the hereditary material found in the nucleus of eukaryotic cells (animal and plant) and the cytoplasm of prokaryotic cells (bacteria) that determines the composition of the organism.

Answer:

nitrogeno

Explanation:

creo xdddd

Answer:

bromine

Explanation:

(Ar)3d10,4s2,4p5

Answer:

Radiation

Conduction

Convection

Explanation:

Radiation: Transfer of heat by electromagnetic rays (Example: A microwave heating food)

Conduction: Transfer of heat energy from one object to another through direct contact (Example: Getting out of bed and your warm feet touch cold tile, making the tile warm and your feet cold)

Convection: Movement of heat by a fluid such as air or water (Example: A convectional oven works by heating the air inside the oven to evenly cook food)

Hope this helps!

1. Here is the skeletal structure of D Ribose with the zigzag staggered conformation and using the wedge/dashed tool to establish the configurations of the chiral carbons:

   O
   |
   C--H
    \
     C--H
    /   \
   C     C--O--H
    \   /
     C--H
    /
   O--H

The substitutive name for D Ribose is D-ribofuranose.

2. Here is the skeletal structure of D Mannose with the zigzag staggered conformation and using the wedge/dashed tool to establish the configurations of the chiral carbons:

   O
   |
   C--H
    \
     C--H
    /   \
   C     C--O--H
    \   /
     C--OH
    /
   O--H

The substitutive name for D Mannose is D-mannopyranose.

For drawing the skeletal structures, I recommend using chemistry drawing software like ChemDraw, or drawing them manually following the conformation and stereochemistry rules described in your question.

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The brief history of the scientist Michael Faraday based on the concept of electricity and magnetism is given below:

Michael Faraday (1791-1867) was a British physicist and chemist who made significant contributions to the fields of electricity and magnetism.

Faraday's most famous experiments involved electricity and magnetism. He demonstrated that a changing magnetic field can induce an electric current in a wire, laying the groundwork for the principle of electromagnetic induction.

He also discovered benzene, a hydrocarbon compound that is a fundamental building block of many organic compounds.

Faraday's experimental design was meticulous, and he was known for his attention to detail and his ability to devise ingenious experiments to test his hypotheses.

For example, he used a simple apparatus consisting of a magnet, a wire, and a galvanometer to demonstrate electromagnetic induction, which he then used to develop the first electric generator.

Faraday faced numerous challenges during his lifetime, including financial difficulties and social prejudice.

Despite these challenges, Faraday's contributions to science were groundbreaking, and his legacy continues to influence the way we understand the world today.

He was a brilliant experimentalist who paved the way for many of the technological advances of the modern era, and his work remains a source of inspiration for scientists and inventors around the world

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Answer:

Granite

Explanation:

It is mostly found because magma rises into and through the other plate, solidifying into granite.

Hope it helped brainiest plz

Answer:

no so boring........................

To prepare 250. ml of a 0.125 m solution of solid KCl are needed: 1.125 grams of solid KCl

To solve this problem the formulas and the procedures that we have to use are:

Where:

Information about the problem:

By converting the volume units from (ml) to (L) we have:

v(solution) = 250 ml * 1 L/1000 ml

v(solution) = 0,250 L

Applying the molar concentration formula and clearing the mole (n) we get:

m= n(sto)/v(soution) L

n(KCl) = m * v(soution) L

n(KCl) = 0.125 mol/L * 0.250 L

n(KCl) = 0.03125 mol

Applying the molecular weight formula we get:

MW= ∑ AWT

MW(KCl)= 19 g/mol + 17 g/mol

MW(KCl)= 36 g/mol

Applying the mole (n) formula and clearing the mass (m) we get:

n = m / MW

m = n * MW

m(KCl) = n(KCl) * MW(KCl)

m(KCl) = 0.03125 mol * 36 g/mol

m(KCl) = 1.125 g

In chemistry a solution is known as a homogeneous mixture of two or more components called:

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For ratio 5:2,  17.5 cups of flour, the is to be add is 7 cups water.

Given, ratio is 5:2

Let, 5x = 17.5

x = 3.5

Then, 2x = 7

Hence, there is 7 cups of water to add.

A ratio is an ordered pair of numbers x and y, written x / y, where y does not equal 0. A proportion is an equation in which two ratios are set equal to each other.

For example, if there is 5 men and 3 women you could write the ratio as: 5 : 3 , for every 5 men there are 3 women.

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Answer:

NO2

Explanation:

N = Nitrogen

O = Oxygen

Answer:

NO. 2.

is the answer

hopes this helps

124 L is the correct answer

Thus, the volume of the helium is 124 L when the balloon rises to an altitude where the pressure is only 25 kPa.

What is temperature ?

Temperature is a measure of the thermal energy of a substance or system. It reflects the degree of hotness or coldness of a material, and is a crucial parameter in many physical and biological systems. It is usually measured in units of kelvins, Celsius, or Fahrenheit. The Kelvin scale is an absolute temperature scale, where 0 K represents absolute zero, the temperature at which all matter has no thermal energy. The Celsius and Fahrenheit scales are relative temperature scales, with 0°C and 32°F defined as the freezing point of water and 100°C and 212°F defined as the boiling point of water.

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Answer: 10y/s

Explanation:

Sc₂O₃ react when the solution becomes acidic.

Sc₂O₃  is scandium oxide , it does not react with pure water. Scandium oxide is basic metal oxide. it can react with aqueous acid solution. it produce scandium ion and liquid water. acids can be represented by H⁺ ion . the reaction is as follows:

Scandium oxide react with acidic solution produce scandium ion and liquid water:

Sc₂O₃(s)   +   6H⁺(aq) ------>   2Sc³⁺(aq)    +   3H₂O(l)

lets us take an example with HCl :

Sc₂O₃   +    6HCl    ----->   2ScCl₃    +   3H₂O

The above is the balanced chemical equation

Thus, Sc₂O₃ react when the solution is becomes acidic.

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