Summary of covalent bonding

Question 1

When does covalent bonding occur?

Answer 1

When pairs of electrons are shared by atoms

Question 2

How do two chlorine molecules stay together?

Answer 2

Weak intermolecular forces of attraction

Question 3

Word equation for reaction of hydrogen with chlorine:

Answer 3

Chlorine + hydrogen —> hydrogen chloride

Cl2. +. H2. —>. 2HCl

Question 4

How do the covalent bonds in the water molecule hold the hydrogen and oxygen atoms together?

Answer 4

Attraction between shared pair of electrons and the nuclei

Question 5

Why do simple covalent molecules like water have a such low melting points?

Answer 5

Weak intermolecular bonds

Question 6

What is meant by the term compound?

Answer 6

Two or more elements chemically bonded together

Question 7

Number of protons, neutrons and electrons in an atom of 79 Br :

Answer 7

Protons = 35 
Neutrons = 44
Electrons = 35

Question 8

What name is used for atoms of bromine that have different numbers of neutrons?

Answer 8

Isotopes