Three element A,B,C have atomic number 8,11,12 respectively state which of the three element belongs to the s block of the periodic table

Answer 1

To determine which elements belong to the s-block of the periodic table, we can refer to their atomic numbers.

1. Element A with atomic number 8 is oxygen (O). It is in the p-block.
2. Element B with atomic number 11 is sodium (Na). It is in the s-block.
3. Element C with atomic number 12 is magnesium (Mg). It is also in the s-block.

Therefore, elements B (sodium) and C (magnesium) belong to the s-block of the periodic table.