What are the trends of sodium

SODIUM is an alkali metal and is present in 3rd period.

atomic  radius: 227pm

atomic mass:23

atomic no: 11

electronegativity:0.93

So, as it is very low electronegativity that is why the sodium forms ionic bonds with elements having large electronegetivity values like Clorine , Bromine etc

that's what i got you can count the number of atoms

atomic mass = 39

number of neutrons = 20

number of protons= 19

electronic configuration = 1s2 2s2 2p6 3s2 3p6 4s1

the number of electron in first shell = 2

number of electrons in n=3 shell = 8