Question

Answer the following questions: (I) Name three elements that have one electron in their valence shells (II) name three elements which forms the oxides with the formula R2O7 (III) name the element which has an uncertain position in the periodic table.

Answer 1

Answer:

1. Electronic configuration of the element with 3 shells and 3 valence electrons is 2,8,3.

Answer 2

Answer:

1) sodium , chlorine , potassium

Explanation: