Assertion(A): Helium and berylium having similar outer electronic configuration of type $$ns^2$$ .
Reason(R): Both are chemically inert.

1. Both A and R are true and R is the correct explanation of A.
2. Both A and R are true but R is not the correct explanation of A.
3. A is true and R is false.
4. A and R both are false.

Subtopic:  AUFBAU Principle |
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh
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Match the following rules with their statements.

 Rules Statements A. Hund’s Rule 1. No two electrons in an atom can have the same set of four quantum numbers. B. Aufbau Principle 2. In the ground state of atoms, orbitals are filled in the order of their increasing energies. C. Pauli Exclusion Principle 3. Pairing of electrons in the orbitals belonging to the same subshell does not take place until each orbital is singly occupied. D. Heisenberg’s Uncertainty Principle 4. It is impossible to determine the exact position and exact momentum of a subatomic particle simultaneously.

Correct option is:

1) A-1,B-2,C-3,D-4

2) A-1,B-3,C-2,D-4

3) A-3,B-2,C-1,D-4

4) A-3,B-1,C-2,D-4

Subtopic:  Pauli's Exclusion Principle & Hund's Rule | AUFBAU Principle |
To view explanation, please take trial in the course below.
NEET 2023 - Target Batch - Aryan Raj Singh