Unit B Section 3.3

Question 1

What is a molecular compound?

Answer 1

When non-metals combine, a pure substance called a molecule or a molecular compound is formed.

Question 2

How molecular compounds differ from ionic compounds?

Answer 2

• They can be solids, liquids, or gases at room temperature.
• They tend to be insulators,
• low melting and boiling points because the forces between the molecules are weak.

Question 3

Examples of molecular compounds?

Answer 3

sugar, acetylene, and water

Question 4

Difference between ionic and molecular compound formulas?

Answer 4

The molecular compound formula has no ions are present and the ion charge is not used in the formulas

Question 5

How to name molecular compounds?

Answer 5

1) The first element in the compound uses the element name.
2) The second element in the compound has the suffix ‘ide’
3) When there is more than one atom in the formula, a prefix is used which specifies the number of atoms.
4) when the first element has only one atom, the prefix mono is not used.

ex. N20__ Dinitrogen Monoxide
N2O3__dinitrogen trioxide
NF3__ Nitrogen trifluoride