CHEMISTRY HIGH SCHOOL

Given any two elements within a group, is the element with the larger atomic number likely to have a larger or smaller atomic radius than the other element

Answers

Answer 1

Answer:

Answer:

Atomic radius of sodium = 227 pm

Atomic radius of potassium = 280 pm

Explanation:

Atomic radii trend along group:

As we move down the group atomic radii increased with increase of atomic number. The addition of electron in next level cause the atomic radii to increased. The hold of nucleus on valance shell become weaker because of shielding of electrons thus size of atom increased.

Consider the example of sodium and potassium.

Sodium is present above the potassium with in same group i.e, group one.

The atomic number of sodium is 11 and potassium 19.

So potassium will have larger atomic radius as compared to sodium.

Atomic radius of sodium = 227 pm

Atomic radius of potassium = 280 pm

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Which statement best describes why specific heat capacity is often more useful than heat capacity for scientists when comparing two materials?Specific heat capacity is an intensive property and does not depend on sample size.
Specific heat capacity is an extensive property and does not depend on sample size.
Specific heat capacity is an intensive property and depends on the sample size.
Specific heat capacity is an extensive property and depends on the sample size.

Answers

The correct option is this: SPECIFIC HEAT CAPACITY IS AN INTENSIVE PROPERTY AND DOES NOT DEPEND ON SAMPLE SIZE.

Generally, all the properties of matters can be divided into two classes, these are intensive and extensive properties. Intensive properties are those properties that are not determined by the quantity of the material that is present or available. Examples of intensive properties are colour, density and specific heat capacity. For instance, whether you have a bucket of water or a cup of water, the quantity does not matter, the colour of water will always remain the same. Extensive properties in contrast, are those properties that depend on the quantity of material that is available. Examples are mass, heat capacity and volume.

Specific heat capacity is defined as the amount of heat required to increase the temperature of 1 gram of a substance by 1-degree Celsius.

The specific heat capacity is more often used for comparing materials, as it is an intensive property. Thus, statement A is correct.

What is the use of Specific Heat Capacity?

Specific heat capacity, which is also referred to as massic heat capacity, is the amount of heat added to 1 gram of mass to raise the temperature by 1-degree Celsius.

Specific heat is an intensive property and is not dependent on the size of the sample. This property of the specific heat is used to compare two materials.

Intensive properties are those properties that are not affected by the quantity of the material. Thus, statement A is correct, Specific heat capacity is an intensive property and does not depend on sample size.

Learn more about specific heat capacity, here: brainly.com/question/13369050

When floral design first emerged as an art form, which technique was emphasized?

Answers

using flowers in their natural state and shape

How will an energy diagram look for an exothermic reaction?The reactants and products will be at the same potential energy.

The reactants are at a higher potential energy compared to the products.

The reactants are at a lower potential energy compared to the products.

There will not be an activation energy barrier.

Answers

Answer : The correct option is, The reactants are at a higher potential energy compared to the products.

Explanation :

Exothermic reaction means energy is released and the overall enthalpy change is negative.

In exothermic reaction, the reactants are at a higher potential energy compared to the products. In other words, we can say that the products are more stable than the reactants.

B.) The reactants are at a higher potential energy compared to the products.

My reason being is because the reactants tend to gather "hyper" energy which is also known as potential energy and this will occur as shown in the answer as an Exothermic Reaction.

I really hope that this helps you out a lot. Have a nice day :)

Which statement describes a concept included in the wave-mechanical model of the atom?

Answers

The wave-mechanical model of the atom was proposed by Erwin Schrodinger that combined the works of Bohr and de Broglie. The electron was a three dimensional wave circling the nucleus in a whole number of wavelengths allowing the waveform to repeat itself as a stable standing wave (it can absorb energy form a nearby source which is oscillating at a proper frequency) representing the energy levels of Bohr model. He also said that Broglie’s model was correct about the matter waves and the electrons are located in the atomic space according to standing wave frequencies.

Which of the following aqueous solutions would have the greatest freezing-point depression?(A) 0.10 m (NH₄)₂SO₄
(B) 0.10 m MnSO₄
(C) 0.10 m NaF
(D) 0.10 m KCI
(E) 0.10 m CH₃OH

Answers

The greatest aqueous freezing point is (D) 0.10 KCI

For an ideal gas, classify the following pairs of properties as directly or inversely proportional.P and T
V and n
T and V
P and V
P and n

Answers

For an ideal gas, the ideal gas equation can be used to relate the changes in the conditions of the system. The equation is expressed as:

PV = nRT

Therefore, the following are classified as:
P and T = directly proportional
V and n = directly proportional
T and V = directly proportional
P and V = inversely proportional
P and n = directly proportional

The following pairs of properties as

directly proportional :

P and T

V and n

T and V

P and n

inversely proportional :

P and V

Further explanation

Some of the laws regarding gas, can apply to ideal gas (volume expansion does not occur when the gas is heated), among others

Boyle's law at constant T, P = 1 / V
Charles's law, at constant P, V = T
Avogadro's law, at constant P and T, V = n

So that the three laws can be combined into a single gas equation, the ideal gas equation

In general, the gas equation can be written

$\large{\boxed{\bold{PV=nRT}}}$

where

P = pressure, atm

V = volume, liter

n = number of moles

R = gas constant = 0.082 l.atm / mol K

T = temperature, Kelvin

Proportional Comparisons / Directly proportional are comparisons of two or more numbers where one number increases, the other numbers also increase at the same rate

Can be formulated

$\displaystyle \frac {x1} {y1} = \frac {x2} {y2}$