Question

How many shells and valence electrons will an element belonging to period 3 group 2 will have?

Answer 1

Answer:

All the elements in the same column as boron have the same number of valence electrons (3). Hence, they all have valency equal to 3. They all have similar number of valence electrons (7). They all are highly electronegative elements and all are non-metals.

Explanation:

Answer 2

Answer:

All the elements in the same column as boron have the same number of valence electrons (3). Hence, they all have valency equal to 3. They all have similar number of valence electrons (7).