Naming Ionic Compounds

Naming Ionic Compounds

Vocabulary

• Ion: an atom that has gained or lost electrons

• Cation: positively charged ion, LOSES electrons

• Anion: negatively charged ion, GAINS electrons

Multiple Choice

Metals tend to __________.

• gain electrons

• lose electrons

Multiple Choice

Nonmetals tend to ______.

• gain electrons

• lose electrons

Multiple Select

Which neutral atom would form a cation?

Choose all that apply.

• Potassium (K)

• Oxygen (O)

• Neon (Ne)

• Barium (Ba)

Multiple Select

Which neutral atom would form an anion?

Choose all that apply.

• Helium (He)

• Magnesium (Mg)

• Oxygen (O)

• Fluorine (F)

Oxidation number

• Oxidation number: a positive or negative number that indicates how many electrons have been lost, gained, or shared to become stable.

• For ionic compounds, the oxidation number is the same as the charge on the ion.

• Example: A sodium ion has a charge of +1 and an oxidation number of +1

Multiple Choice

In ionic compounds, the oxidation number is ______ as the charge of the ion.

• the same

• different

Multiple Choice

What is the oxidation number of sodium (Na)?

• +1

• -1

• -6

• +6

Oxidation Numbers and the Periodic Table

• Elements in the same group (column) have the same oxidation number.

Multiple Choice

Elements in the same group have the same oxidation number.

• True

• False

Multiple Choice

Elements in group 2 (2A) have what oxidation number?

• +2

• +1

• -2

• -3

Binary Compounds

• Binary compounds: compounds composed of two elements

• Example: LiF (lithium fluoride)

Naming Ionic Compounds (LiBr)

• Lithium (cation) / Bromine (anion)

• Lithium

• Bromide

• Lithium bromide

Multiple Choice

When naming an ionic compound, which name stays exactly as it is?

• The cation

• The anion

Open Ended

When changing the anion's name, we cut off the end of the word and add what 3 letters?

Multiple Choice

What would a chemist name the compound BaO?

• Barium oxide

• Barium oxygenide

• Oxygen baride

• Oxygen bariumide

Open Ended

What is the name of Li₂S?

Use the periodic table to help you name the elements.

Open Ended

What is the name for MgCl₂?

Open Ended

What is the name for Al₂O₃?

Poll

On a scale 1-3 how do we feel about naming ionic compounds?

• 1 (no idea what I'm doing)

• 2 (I need a little more practice)

• 3 (this is so easy)