How and why does metallic character vary in a group from top to bottom?

The positions of the elements A to J are given in the periodic table consisting of only main group of elements.

(a) Which of the elements resembles aluminium?

(b) Which of the elements is a noble gas?

(c) Which of the elements is more reactive - F or J?

(d) Which of the elements forms anion of the type ${\mathrm{X}}^{-}$ ?

(e) Write the formula of the compound formed between H and J.