ions

Ions are: 

• atoms with a positive or negative charge
• atoms with no charge
• atoms with ONLY a positive charge
• atoms with ONLY a negative charge

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

• positive

• negative

• neutral

• polyatomic

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

• positive
• negative
• neutral
• polyatomic

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

If an element has 3 valence electrons, what charge will likely form on its ion ?

• +3

• +5

• -3

• -5

Nitrogen will ____ valence electrons when forming an ionic bond.

• gain 1
• lose 1
• gain 3
• lose 3

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

Atoms are most stable when their outer shell is filled with electrons.

• true
• false

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

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

• -1
• -2
• +1
• +2

Tags

NGSS.HS-PS1-1

Why are ions formed?

• To make our lives difficult
• Because atoms want 8 valence electrons
• Because atoms have the same number of protons and electrons
• Because atoms gained neutrons

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the charge of a sodium ion?

• +2

• +1

• -1

• -2

Group 7 always has ions with a charge of

• +1

• +2

• -1

• -2