Ions and Formulas

A negatively-charged ion.

• atom
• cation
• anion
• electron

An atom that has lost or gained electrons; an atom with a charge.

• cation
• anion
• isotope
• ion

Cations are

• positive
• negative
• on the right side of the periodic table.
• nonmetals

Na ⁺  and  S ^-2

• Na₂S
• NaS₂
• Na₂S₂
• NaS

Tags

NGSS.HS-PS1-2

K ⁺  and  N^-3

• KN
• KN₃
• K₃N₃
• K₃N

Tags

NGSS.HS-PS1-2

The chemical formula for an ionic compound of potassium and oxygen is

• KO.
• K₂O.
• K₂O₂.
• KO₂.

How many valence electrons does a bromine atom have?

• 1
• 2
• 6
• 7

Tags

NGSS.HS-PS1-1

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

• -1
• -2
• +1
• +2

When naming ionic compounds, the cation is always named first and the anion is always named second.

• False
• True

Which of the following will form an ion with a 2- charge?

• Ca
• Se
• Ge
• N

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2