1.8 Covalent bonding

Question 1

What is the book definition of a covalent bond?

Answer 1

The strong electrostatic attraction between the nuclei of the atoms and the shared pair of electrons.

Question 2

What is a simple molecular structure?

Answer 2

A molecule that only contains a few atoms held together by covalent bonds

Question 3

What state of matter do substances with simple molecular structures tend to be?

Answer 3

Gases or liquids, or solids with low melting and boiling points

Question 4

What happens as the relative molecular mass increases?

Answer 4

The intermolecular forces of attraction must become stronger

Question 5

Physical properties of covalent compounds

Answer 5

-do not conduct electricity
-tend to be insoluble in water
-soluble in organic solvents

Question 6

What is a giant covalent structure?

Answer 6

A three-dimensional structure of atoms that are joined by covalent bonds

Question 7

Properties of diamond

Answer 7

-hard
-high melting point
-insoluble in water
-does not conduct electricity

Question 8

Properties of graphite

Answer 8

-soft
-layers slide over each other
-high melting and boiling point
-conducts electricity

Question 9

What is an allotrope?

Answer 9

Different forms of the same element