Unit 3 Chemistry Review - Atomic Structure

Front

Which parts of the atom move around the nucleus?

Back

Electrons are the parts of the atom that move around the nucleus.

Front

The center of an atom is called the ________________.

Back

The center of an atom is called the nucleus.

Front

Which scientist said that atoms of the same element are identical, but atoms of one element are different from those of another element?

Back

John Dalton proposed that atoms of the same element are identical, while atoms of different elements are different.

Front

How many electrons does sulfur have?

Back

Sulfur has 16 electrons.

Front

Anions are...

Back

Anions are negatively charged ions.

Front

What is the charge of a proton?

Back

A proton has a positive charge.

Front

What is the charge of a neutron?

Back

A neutron has no charge (neutral).

Front

What is the charge of an electron?

Back

An electron has a negative charge.

Front

What is the atomic number of an element?

Back

The atomic number is the number of protons in the nucleus of an atom.

Front

What is the mass number of an atom?

Back

The mass number is the total number of protons and neutrons in the nucleus.