Chemical Bonding

Question 1

Atoms bond with each other…?

Answer 1

• To obtain noble gas electron structure for stability

- To obtain a lower state of energy

Question 2

Attractive forces between?…

Answer 2

• the nucleus of an atom (+) and its own electrons (-)

- the nucleus of an atom (+) and the electrons of another atom (-)

Question 3

Repulsive forces between?…

Answer 3

• the nucleus (+) and another nucleus (+)

- the electrons (-) and other electrons (-)

Question 4

Distance between nuclei of the atoms?

Answer 4

Bond length

Question 5

Bond lengths

Answer 5

• Bond strength and bond length are inversely related i.e a short bond is generally stronger than a long one

Question 6

Valence electrons/Valency

Answer 6

NB: No. of valence electrons = group number on periodic table
The valency of an element is a measure of its ability to combine with other elements
Groups 1-4 - Valency = group No.
Groups 5-8 - Valency = 8 - group no.
Zinc = 2, Silver= 1