Question

In period 3 of periodic table, element B is placed to the left of element A. On the basis of this information, choose the correct word from the brackets to complete the following statements

1. The element B would have (lower/ higher) metallic character than A
2. The element A would probably have (lesser/ higher) electron affinity than B
3. The element A would have (greater/ smaller) atomic size than B

Answer 1

• The element B would have a higher metallic character than A. Metallic character depends on the atomic size and less ionisation potential. So from left to right metallic character decreases.
• The element A would probably have a higher electron affinity than B. Electron affinity increases from left to right to the periodic table
• The element A would have a smaller atomic size than B. From left to right in a periodic table, atomic size decreases due to an increase in nuclear charge