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Question (11)

QN007022

The shell nearest to the nucleus is filled first because it has —

(A) Highest energy
(B) Lowest energy
(C) No energy
(D) Equal energy

Correct Answer: B

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Question (12)

QN007023

An atom has electronic configuration 2, 8, 1. Its total number of electrons is —

(A) 8
(B) 9
(C) 10
(D) 11

Correct Answer: D

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Question (13)

QN007024

The maximum number of electrons in the M shell according to 2n² rule is —

(A) 8
(B) 18
(C) 32
(D) 50

Correct Answer: B

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Question (14)

QN007025

Which electronic configuration is correct for magnesium (atomic number 12)?

(A) 2, 8, 2
(B) 2, 6, 4
(C) 2, 8, 8
(D) 2, 4, 6

Correct Answer: A

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Question (15)

QN007026

The shell with n = 1 can accommodate maximum —

(A) 1 electron
(B) 2 electrons
(C) 4 electrons
(D) 8 electrons

Correct Answer: B

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Question (16)

QN007027

An atom has 17 electrons. Its electronic configuration is —

(A) 2, 8, 7
(B) 2, 7, 8
(C) 8, 2, 7
(D) 2, 8, 8

Correct Answer: A

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Question (17)

QN007028

The distribution of electrons in shells is called —

(A) Ionisation
(B) Valency
(C) Electronic configuration
(D) Radioactivity

Correct Answer: C

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Question (18)

QN007029

Which shell is filled after the K shell?

(A) M shell
(B) N shell
(C) L shell
(D) O shell

Correct Answer: C

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Question (19)

QN007030

The maximum number of electrons possible in the shell where n = 4 is —

(A) 8
(B) 18
(C) 32
(D) 50

Correct Answer: C

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Question (20)

QN007031

Which of the following electronic configurations is impossible?

(A) 2, 8, 1
(B) 2, 8, 8
(C) 2, 10, 1
(D) 2, 7

Correct Answer: C

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