M18 - Lesson 3 - Writing Fromulas & Naming Compounds

Binary compounds are composed of __ atoms.

• one

• two

• four

• many

For an ion, the oxidation number is __.

• zero

• always negative

• one less than the charge on the ion

• the same as the charge on the ion

Compounds that are hydrates contain which of the following?

• water

• chlorine

• hydrogen chloride

• nitrogen

A polyatomic ion is another name for a __ ion.

• positive

• negative

• complex

• neutral

What is the difference between carbon monoxide and carbon dioxide?

• Carbon monoxide has two carbon atoms

• Carbon dioxide has only one oxygen atom

• Carbon dioxide has two carbon atoms

• Carbon monoxide has only one oxygen atom

Is a molecule of hydrogen chloride (HCl) polar or nonpolar?

• polar

• nonpolar

• both

• neither

Which of the following are polyatomic ions? Select all that apply

• NH₄⁺

• Na⁺

• CO₃²⁻

• PO₄³⁻

• Ca²⁺

Which of the following may be classified as a binary compound?

• NH₄Cl

• Mg(OH)₂

• H₂SO₄

• NaCl

How many potassium atoms and how many oxygen atoms are there in a binary compound made from these two elements?

• one potassium and two oxygen

• one potassium and one oxygen

• two potassium and one oxygen

• three potassium and one oxygen

Because a water molecule has a slight positive charge at one end and a slight negative charge at the other end, it is a ___ molecule.

• nonpolar

• polar

• ionic

• single nonpolar