Question

5. The atomic number of an element is 11. Predict: a) The name and the valency of the element. b) The group number and the period to which it belong. c) The nature of the oxide formed and its formula.

Answer 1

the name and the valency of the elements

Answer 2

name: sodium

valency: 1

group no. : 1st

period no. : 3rd

sodiumoxide: Na2o