A few questions?

Question

1) Which atom on the periodic table is largest? Smallest?

2) Which atom on the periodic table has highest ionization energy? Lowest?

3) Which atom on the periodic table has the highest electronegativity? Lowest?

4) Which subatomic particle(s) in an atom have a mass of 1 amu?

5) Which subatomic particle(s) in an atom have a mass of 1/1837 amu?

Some explanation would be helpful! Thanks!

Answer 1

1) lower left, Francium, upper right, Fluorine
2) upper right, lower left (excluding the noble gases)
3) upper right, lower left
4) proton and neutron
5) electron