Question

pls answer above mcq​

Answer 1

1. Effect of nuclear charge increases along the period option (a)

2. Mass no = no. of protons + no. of neutrons option (a)

3. 13 option (b)

4. Electron affinity decreases down the groups option (b)

5. Answer is Al, option (c), since atomic number is 13 and no. of protons = no. of electrons

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