Question

Any three elements and atomic number, element name symbol and valency.​

Answer 1

1.) Valency of Hydrogen = 1

Atomic number = 1

Symbol = H

2)Valency of Helium = 0

Atomic number = 2

Symbol = He

3)Valency of Lithium 1

Atomic number = 3.

Symbol = Li

Answer 2

Answer:

    element     atomic number   element name sumbol   valency    

1)   hydrogen          1                                   H                             1

2)   sodium             11                               Na                             1

3) magnesium         12                              Mg                            2

Explanation: