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Question (41)

QN007052

Which shell has least energy?

(A) K
(B) L
(C) M
(D) N

Correct Answer: A

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Question (42)

QN007053

The electronic configuration of chlorine (17 electrons) 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 (43)

QN007054

Which of the following electronic configurations is stable due to complete octet?

(A) 2, 7
(B) 2, 8
(C) 2, 8, 1
(D) 2, 5

Correct Answer: B

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Question (44)

QN007055

The maximum number of electrons in the shell with n = 5 is —

(A) 18
(B) 32
(C) 50
(D) 72

Correct Answer: C

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Question (45)

QN007056

An atom contains 19 electrons. Its electronic configuration is —

(A) 2, 8, 8, 1
(B) 2, 8, 9
(C) 2, 7, 10
(D) 8, 8, 3

Correct Answer: A

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Question (46)

QN007057

Which shell is filled before the M shell?

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

Correct Answer: C

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Question (47)

QN007058

The electronic configuration 2, 8, 8, 2 belongs to an element with atomic number —

(A) 18
(B) 20
(C) 22
(D) 28

Correct Answer: B

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Question (48)

QN007059

The maximum number of electrons possible in K and L shells together is —

(A) 8
(B) 10
(C) 18
(D) 32

Correct Answer: B

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Question (49)

QN007060

Which of the following configurations violates the octet rule for outermost shell?

(A) 2, 8, 8
(B) 2, 8, 9
(C) 2, 8, 1
(D) 2, 7

Correct Answer: B

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Question (50)

QN007061

Electrons occupy shells around the nucleus because shells represent different —

(A) Mass numbers
(B) Energy levels
(C) Atomic masses
(D) Nuclei

Correct Answer: B

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