Evaluating Scientific Explanations

Question 1

Which scientist and atomic model are correctly matched?

Revolt · Accepted Answer

Schrödinger – electron cloud surrounds nucleus

Question 2

Using a cathode ray tube, Thomson confirmed that

Revolt · Accepted Answer

atoms include particles that have a negative charge.

Question 3

The scattering of a stream of positively charged particles when striking a thin film of gold confirms that

Revolt · Accepted Answer

the positive charge in an atom must be located in a dense central mass.

Question 4

An atom’s emission of light with a specific amount of energy confirms that

Revolt · Accepted Answer

electrons emit and absorb energy based on their position around the nucleus.

Question 5

Dalton’s theory states that atoms are the smallest possible parts of elements. In a chemical reaction, atoms will

Revolt · Accepted Answer

rearrange and form new substances with new properties.

Question 6

Who first used the word “atomos” to describe the smallest unit of a substance?

Revolt · Accepted Answer

Democritus

Question 7

What did Thomson’s and Rutherford’s experiments have in common?

Revolt · Accepted Answer

They both used charged particles in their experiments.

Evaluating Scientific Explanations Answers