Forming Ions

An example of a CATION is

• Ca⁺²

• In⁺³

• Li⁺¹

• All of these are cations.

Tags

NGSS.HS-PS1-2

An example of an ANION is

• Cl^-1

• N^-3

• Se^-2

• These are all examples of anions.

Tags

NGSS.HS-PS1-2

Alkali metals (Group 1 metals) form

• +1 ions

• +2 ions

• -1 ions

• -2 ions

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

Alkaline Earth metals (Group 2) form

• +1 ions

• +2 ions

• +3 ions

• -6 ions

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

Group 13 metals and Boron form

• +3 ions

• -5 ions

• -3 ions

• +5 ions

Hydrogen ...

• is the only element that forms more than one ion charge.

• forms only +1 ions.

• forms only -1 ions

• can form +1 ions and -1 ions.

Carbon ...

• is the only element that can form more than one ion charge.

• can only form +4 ions

• can only form -4 ions.

• can form +4 ions and -4 ions.

The halogens (Group 17)

• have 7 valence electrons.

• form -1 ions

• are the most reactive family of nonmetal elements.

• All of these are true.

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-1

The chalcogens (Group 16)

• form +2 ions

• form -2 ions

• form +6 ions

• form -6 ions

Tags

NGSS.HS-PS1-2

Elements that are metalloids

• never form ions.

• only form positively charged ions.

• only form negatively charged ions.

• usually form more than one ion charge.