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Questions

Question (1)

QN006912

Atomic number of an element is equal to the number of —

(A) Neutrons
(B) Electrons and neutrons
(C) Protons
(D) Nucleons

Correct Answer: C

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Question (2)

QN006913

The atomic number is represented by the letter —

(A) A
(B) Z
(C) N
(D) M

Correct Answer: B

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Question (3)

QN006914

The atomic number of oxygen is 8. The number of protons present is —

(A) 16
(B) 8
(C) 4
(D) 2

Correct Answer: B

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Question (4)

QN006915

In a neutral atom, atomic number is equal to the number of —

(A) Neutrons
(B) Electrons
(C) Nucleons
(D) Shells

Correct Answer: B

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Question (5)

QN006916

Which quantity determines the identity of an element?

(A) Mass number
(B) Atomic number
(C) Valency
(D) Atomic mass

Correct Answer: B

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Question (6)

QN006917

An atom contains 13 protons. Its atomic number is —

(A) 26
(B) 13
(C) 14
(D) 27

Correct Answer: B

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Question (7)

QN006918

If the atomic number of sodium is 11, the number of electrons in a neutral sodium atom is —

(A) 10
(B) 11
(C) 12
(D) 22

Correct Answer: B

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Question (8)

QN006919

The atomic number of carbon is 6. Carbon atom contains —

(A) 6 neutrons only
(B) 6 protons only
(C) 6 protons and 6 electrons
(D) 12 electrons

Correct Answer: C

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Question (9)

QN006920

Which of the following has atomic number 17?

(A) Oxygen
(B) Sodium
(C) Chlorine
(D) Calcium

Correct Answer: C

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Question (10)

QN006921

The lower number written in the symbolic representation of an atom represents —

(A) Mass number
(B) Atomic number
(C) Number of neutrons
(D) Valency

Correct Answer: B

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