Question

what is the difference between sodium atom and sodium ion?

Answer 1

sodium atom by losing one electron become sodium ion which is positively charged whereas sodium atom does not have any charge

Answer 2

Sodium atom

1.    Sodium atom is electrically neutral.
2.    In sodium atom, there are 11 protons and 11 electrons, i.e., equal number of protons and electrons
3.    A sodium atom has only one electron in its valence shell
4.    The size of sodium atom is bigger than that a sodium ion.
5.    The sodium atom is very reactive. It reacts with air or water readily.

Sodium ion:

1.    Sodium ion is positively charged
2.    In sodium ion, there are 11 protons but 10 electrons, i.e., sodium ion contains lesser number of electrons.
3.    Sodium ion has 8 electrons in its valence shell.
4.    The size of sodium ion is smaller than that of sodium atom