Atoms, atomic number and size are factors that define an element and depending on the atomic size or number, an element can be placed as a solid, gas or liquid in a periodic table. This is a good challenge for you if you just studied the periodic table. Give it a shot!
Decreases as you go down due to the addition of new layers of electrons
Increases as you go down due to the changes in orientation of electrons along the various axes.
Increases in size as you go down due to the addition of new layers of electrons.
Increases in size due to advanced electronic transmutations.
Decreases due to increased attraction between the positively charged nucleus and the negatively charged electrons.
Increases due to the addition of layers of electrons as you move across the series.
Increases due to the addition of neutrons, electrons, and protons
Decreases due to the removal of layers of electrons.
Here's an interesting quiz for you.