Question

5. The atomic number of elements A and B are 8 and 13 respectively. Give the answer of
following questions.
1) Give the electronic configuration of elements A and B in terms of sub shells.
ii) State the blocks of periodic table to which these elements belong to.
iii) Write the molecular formula of compound formed by the combination of above elements​

Answer 1

Answer:

• Atomic no 8, oxygen, 1s^2,2s^2,2p,
• Atomic no 13,, aluminium, 1s^2,2s^2,2p^6,3s^2,3p^1

2) oxygen - p block element

Aluminum - d block element.

3) Al2O3