Which of the following has maximum density?

Match List I with List II.
     List I                                                                             List II

A. Modern periodic law                                                 1. Groups

B. Father of Periodic Table                                           2. Moseley

C. Vertical lines in Modern Periodic Table                    3. Periods

D. Horizontal lines in Modern Periodic Table                4. Mendeleev

Assertion (A) Ionisation energy decreases on moving down the group.

Reason (R) Force of attraction between electrons and nucleus decreases on moving down the group.

Assertion (A) Noble gases have the lowest ionization enthalpies in their respective periods.

Reason (R) Noble gases have stable electronic configuration.

Match List I with List II.
     List I                                                             List II

A. Element with smallest atomic radius        1. Fr

B. Element with largest atomic radius           2. He

C. Element with highest electron affinity       3. Br

D. Element with negative electron affinity     4. Cl

Consider the following statements

1. Technetium was the first element to be made artificially.

2. The non-metals are poor conductors of heat and electricity.

3. Hydrogen has a single positive charge, like the alkali metals, but at room temperature, it is a gas that doesn't act labeled a metal. Therefore hydrogen usually is a non-metal.

Which of the statements given above are correct?