Ions and Valence Electrons

Front

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

Back

positive

Front

How many valence electrons do Group 2 atoms have?

Back

2

Front

Ions have the same number of protons but different number of _________________

Back

electrons

Front

An atom becomes _________ when it gains electrons.

Back

Negative

Front

What is the charge of an atom that has lost one electron?

Back

+1

Front

What are valence electrons?

Back

Electrons in the outermost shell of an atom that determine its chemical properties.

Front

What is an ion?

Back

An atom or molecule that has a net electrical charge due to the loss or gain of one or more electrons.

Front

What charge does an atom have if it gains two electrons?

Back

Negative 2 (-2)

Front

What is the charge of a cation?

Back

Positive

Front

What is the charge of an anion?

Back

Negative