Chapter 5: Chemical Names and Formulas

Chemical Names and Formulas

Periodic Table:

Dimitri Mendeleev –

Henry Mosely –

Periodic Chart – (handout of chart skeleton)

Families (column)

Period (row) –

Group A: (IA – VIIIA) – called the “ “

Because they

Metals-

GROUP B:

Inner Transition Metals

Lanthanide series –

Actinide series –

NONMETALS –

METALLOIDS –

Boron -

Aluminum –

FORMATION OF COMPOUNDS

Compound –

Law of Definite Proportions –

Two types of compounds – 1.

1. Molecular Compounds

Molecule –

Molecular Formula –

· diatomic molecules –

**MEMORIZE** HONClBrIF

2. Ionic Compounds –

Ion –

Cations –

Anions -

· ionic charges of Group A metals (see periodic chart)

· ionic charges of Group B metals (transitional metals) – see periodic chart

“ic” above “ous” –

or Roman Numerals -

Examples

Polyatomic ion –

· add sulfite and phophite to the back of your periodic chart

· hypo -

· per –

Formula Unit –

Chemical Formula –

What is the difference between an ionic compound and a molecular compound?

Why aren’t ionic compounds molecules?

What is the smallest ratio of an ionic compound called?

Name the 7 diatomic elements and then write their formulas correctly:

1. 2.

3. 4.

5. 6.

Metals form ___ ions called ______________.

Nonmetals form ___ions called ____________.

What group of metals (and name) have more than 1 possible charge?

What is a polyatomic ion?