Question

If an element $A$ belongs to Period $3$ and Group II then it will have :

• A. $3$ shells and $2$ valence electrons
• B. $2$ shells and $3$ valence electrons
• C. $3$ shells and $3$ valence electrons
• D. $2$ shells and $2$ valence electrons

Answer 1

The correct option is A $3$ shells and $2$ valence electrons

In the modern periodic table, horizontal columns are termed as groups and vertical rows are termed as periods.The period number indicates the number of the shells whereas the group number indicates the number of valence electrons. Hence, The element A has 3 shells and 2 valence electrons.