Chapter 7: Chemical Formulas

Front

How many atoms are in a molecule of aluminum oxide?

Back

5

Front

How many atoms are in a molecule of sodium chloride?

Back

2

Front

What is the formula mass of a molecule of silver sulfide if the mass number of silver is 108 and the mass number of sulfur is 32?

Back

248

Front

What is the formula mass of a molecule of aluminum chloride if the mass number of aluminum is 27 and the mass number of chlorine is 35?

Back

132

Front

A binary compound contains atoms of:

Back

Two different elements

Front

Every element has its own

Back

chemical symbol

Front

The atoms in a polyatomic ion are joined by...

Back

covalent bonds

Front

Atoms that lose electrons have ______ oxidation numbers.

Back

positive

Front

In a chemical formula, the element written first is ______

Back

a metallic element.

Front

The sum of the mass numbers of all the atoms in a molecule is equal to the molecule's _________.

Back

formula mass