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Ivahew [28]
3 years ago
14

Which is a characteristic of calcium?

Chemistry
1 answer:
posledela3 years ago
4 0
The answer is D
Calcium has two electrons in its outer energy shell
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The table shows the average distance between the molecules of a substance in the solid, liquid, and gaseous states.
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Answer:

Y > X > Z

Explanation:

The intermoecular forces refer to forces that exist between molecules of a substance. They are the secondary bond forces that hold particles of a substance together in a particular state of matter.

The shorter the distance between molecules, the greater the magnitude of intermolecular force between the molecules.

The molecules of Y are at the shortest distance from each other hence they have the highest magnitude of intermolecular forces. Followed by X and lastly Z with the greatest distance between the largest intermolecular distance.

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2 years ago
Which of the following is the best definition of a physical change?
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I think answer is

C. Something that can be observed or measured while changing the identity of the substance
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Answer:

4- A material that transfers heat energy more easily than another material will experience a greater rate of thermal energy loss than an object that does not transfer heat energy easily.

Explanation:

Thermal energy loss has to do with loss of heat energy by a body to another body or its environment. The aim of the process is usually the attainment of thermal equilibrium between the body and its environment.

On a cold day, a material that transfers thermal energy more easily will loose thermal energy faster than an object that does not transfer thermal energy. The rate of heat transfer of a body determines its rate of loss of thermal energy.

6 0
3 years ago
Classify the following as either an element, compound, homogeneous mixture or
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aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa

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