Unit 2 Atomic Theory Review

Front

The term 'atomos' was presented by _______.

Back

Democritus

Front

An atom becomes _______ when it gives away electrons.

Back

Positive

Front

When an atom gives away valence electron, it becomes a(n) _____________ ion.

Back

positive

Front

Isotopes have different numbers of __________.

Back

neutrons

Front

This element has 17 protons. What is its atomic number?

Back

17

Front

What is the charge of a proton?

Back

Positive

Front

What is the charge of an electron?

Back

Negative

Front

What is the charge of a neutron?

Back

Neutral

Front

What is the nucleus of an atom composed of?

Back

Protons and neutrons

Front

What is the main difference between an atom and an ion?

Back

An ion has a net charge due to the loss or gain of electrons.