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Questions on chemical bonding-IGCSE Chemistry

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(b) Q1. Page 88 of textbook, question 6
(d) what kind of chemical bonding is present in the following molecules?
____________________________
Draw dot and cross diagram for these molecules.
Cl2
O2
N2
H2 O
HCl
CO2
(e) what kind of chemical bonding is present in the following molecules?
____________________________
Draw dot and cross diagram for these molecules.
NaCl
MgO
CaCl2
CH4
(f) Use a diagram to show atom and electron arrangement in metals.