Bonding Structure Of 1st 20 Elements

Question 1

The bonding type and structure of Li, Na, K, Mg, Ca, Be and Al is…

Answer 1

Metallic (BT) Lattice (S)

Question 2

Metallic bonds are…

Answer 2

A giant lattice of positively charged ions in a sea of delocalised electrons.

(Li, Na, K, Mg, Ca, Be, Al)

Question 3

As you go along a period metal boiling point…

Answer 3

1. Increases as nuclear charge increases.
2. Forces of attraction between the nucleus and outer electrons increase.
3. Outer electrons are pulled closer to the nucleus.

Question 4

As you go down a group metal boiling point…

Answer 4

1. Decreases as atoms get bigger.
2. Forces of attraction between the nucleus and outer electrons decrease.
3. Metallic bonding strength decreases.

Question 5

Metals have high melting and boiling points because…

Answer 5

The strong intermolecular bonds need to be broken, so more energy is required.

Question 6

Bonding type and structure for B, C and Si is…

Answer 6

Covalent (BT) Network (S)

Question 7

Covalent network bonds are…

Answer 7

A giant lattice so covalently bonded atoms.

B, C (graphite and diamond forms), Si

Question 8

Covalent network molecules have high melting and boiling points because…

Answer 8

Strong intermolecular covalent bonds need to be broken, so more energy is required.

Examples of covalent network compounds are :
silicon carbide and silicon dioxide

Question 9

Bonding type and structure for Cl2, F2, O2, N2, H2, P4, S8, C60, C70, C240 and C360 is…

Answer 9

Covalent (BT) Molecular (S)

Question 10

Covalent molecular bonds are…

Answer 10

Compounds of discreet (seperate) molecules held together by weak intermolecular forces.

(Cl2, F2, O2, N2, H2, P4, S8 (and C in fullerene form: C60, C70, C240, C360))

Question 11

The structure for He, Ne, Ar and Kr is…

Answer 11

Monatomic (S)

Question 12

Monatomic bonds are…

Answer 12

Intermolecular bonds between single atoms that don’t bond with anything else and are very unreactive.