Answer:When heat is added to a substance, the molecules and atoms vibrate faster. As atoms vibrate faster, the space between atoms increases. The motion and spacing of the particles determines the state of matter of the substance. ... They contract when they lose their heat.

Explanation:Google

5 0

2 years ago

Which of the following describes an atom?

vredina [299]

Answer:

Correct answer is option (3) .

Explanation:

Hope it helpful....

7 0

3 years ago

Contrast mixtures with pure substances

dimaraw [331]

Mixtures

consist of two or more substances
have a variable composition
can be separated into their components by physical means

Pure substances

consist of a single element or compound
have a definite and constant composition
cannot be separated into their components by physical means

7 0

3 years ago

» How could a scientist determine on a molecular level whether a chemical reaction has occurred? A. They could see whether atoms

Leto [7]

I think the answer is A

4 0

2 years ago