Question

The elements M, N, 0, P, and Q have atomic numbers 9, 11, 17, 12, and 13 respectively. Identify the pair of elements that belong to the same group.

• A. P and Q
• B. M and 0
• C. N and P
• D. M and N

Answer 1

The correct option is B

M and 0

Groups in the periodic table

The periodic table's columns are referred to as groups. Members of the same group in the table have the same number of electrons in their atoms' outermost shells and form the same type of bond.

Explanation for the correct options:

1. For checking the same group elements we have to write the electronic configuration.
2. M: (2, 7)
   N: (2, 8, 1)
   O: (2, 8, 7)
   P: (2, 8, 2)
   Q: (2, 8, 3)
3. Elements M and O both have 7 valence electrons, as can be seen. As a result, both elements are members of the same group.
4. No other matches are there. All other combinations given are of different valencies

Concluding statement:

As a result, B is the correct answer. M and O.