How do the metallic character and non metallic character vary while moving from left to right in a period? Arriving at a conclusion by assessing the size of atom?

Account for the following: Atomic radius decreases from left to right in a period

What is relationship between metallic character and the size of an atom?

The removal of electrons from an atom become more difficult when we move from left to right of a period. Do you agree with this? Justify.

Considering the elements from left to right in the third period of the periodic table, the atomic volume of the elements:

The pronounced change from non-metallic to metallic behaviour and also increase in the basicity of oxides from nitrogen to bismuth in group 15 is principally due to increasing size of the atoms. The ionisation potential of nitrogen is very high on account of its small size. However, ionisation potential decreases regularly on descending the group. Which of the following fluorides does not exist?

The pronounced change from non-metallic to metallic behaviour and also increase in the basicity of oxides from nitrogen to bismuth in group 15 is principally due to increasing size of the atoms. The ionisation potential of nitrogen is very high on account of its small size. However, ionisation potential decreases regularly on descending the group. In all the group 15 elements, the number of unpaired electrons in the valence shell is:

The pronounced change from non-metallic to metallic behaviour and also increase in the basicity of oxides from nitrogen to bismuth in group 15 is principally due to increasing size of the atoms. The ionisation potential of nitrogen is very high on account of its small size. However, ionisation potential decreases regularly on descending the group. Which one of the following is a strongest base?

What is the general trend in the variation of ionisation energy on moving across a period from left to right?