(a) What is the shape of (i) p - orbital; (ii) a molecule of methane; (iii) a molecule of carbon (IV) oxide? (b) Consider the following elements: Ne, S, CI,...

(a) What is the shape of (i) p - orbital; (ii) a molecule of methane; (iii) a molecule of carbon (IV) oxide?

(b) Consider the following elements: Ne, S, CI, 0, Fe, Mg. State which of them

(i) exhibit(s) allotropy;

(ii) form(s) coloured ions;

(iii) is/are malleable;

(iv) consist(s) of molecules that are far apart at room temperature;

(v) form(s) hydrides by sharing electrons with hydrogen;

(vi) has/have complete outermost shell.

(c)(i) List three applications of radioactivity in different fields.

(ii) Explain clearly the difference between the following reactions involving electron loss from lead.

\(^{211} pb\) \(\to\) \(^{ 211}Bi\) + \(^0_{-1}\); Pb \(\to\)  pb\(^{3+}\) _ 2e\(^-\)

(iii) Give one advantage and one disadvantage of nuclear power generation over the use of fossil fuels.