How do atoms of Na and Cl compare in relative size

please helppp! in chemistry

Na is sodium, with a smaller atomic number than cl, saying, there are more protons and electrons and nutrons
but they are at less than a molecular scale level, and it would not be noticed

Atomic radii tend to decrease when you move to the right or up on the periodic table, and increase as you move to the left or move down. Since Cl is to the right of Na, it is smaller and Na is bigger.

Here is a useful table, it shows the periodic table with diagrams of the radius of each element:
http://www.crystalmaker.com/support/tuto…

Ions of elements however can be much larger or smaller than their parent element, this table shows some ions next to their elements:
http://honorschemistrycyhs.wikispaces.co…