Draw the structure of the following atom showing the nucleus containing protons and neutrons and orbits with the respective electrons: Sodium [ At. no = 11, Mass no = 23]
Question 4
4.
An element "X" has six electrons in its outer or Valence shell. Its Valnecy is ----
1
Question 5
5.
1
Question 6
6.
Why noble gases like helium, neon and argon are inert in nature?
