Question

2 elements that can take or give equal number of electrons

Answer 1

Isotopes :- Those elements who have same number of Protons and Electrons but the different number of Neutrons or Atomic Mass are called Isotopes.

There are 3 isotopes of Hydrogen —

Protium - 1H1 ( Where 1 before the H is number of Proton and Electron and 1 after H is atomic mass )

Deuterium - 1H2

Tritium - 1H3

Answer 2

Answer:

sodium and potassium

Explanation:

sodium atomic number=11

so it donate 1 electron

potassium atomic number is 19

so it also donate 1 electron