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Question (41)

QN007002

The difference between mass number and atomic number gives the number of —

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

Correct Answer: C

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Question (42)

QN007003

Which of the following has smallest mass number?

(A) 5p, 5n
(B) 6p, 7n
(C) 8p, 8n
(D) 10p, 10n

Correct Answer: A

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Question (43)

QN007004

If an atom has 29 protons and 35 neutrons, its mass number is —

(A) 29
(B) 35
(C) 64
(D) 6

Correct Answer: C

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Question (44)

QN007005

The mass number of an atom depends mainly on the particles present in the —

(A) Orbit
(B) Shell
(C) Nucleus
(D) Valence shell

Correct Answer: C

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Question (45)

QN007006

Which notation correctly represents an atom with mass number 27 and atomic number 13?

(A) ¹³₂₇Al
(B) ²⁷₁₃Al
(C) ¹⁴₂₇Al
(D) ²⁷₁₄Al

Correct Answer: B

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Question (46)

QN007007

An atom contains 13 protons and 14 neutrons. Calculate its mass number.

(A) 13
(B) 14
(C) 27
(D) 1

Correct Answer: C

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Question (47)

QN007008

Which quantity remains unchanged if only electrons are removed from an atom?

(A) Mass number
(B) Atomic radius
(C) Ionic charge
(D) Electronic configuration

Correct Answer: A

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Question (48)

QN007009

The nucleus of an atom contributes most to the —

(A) Colour
(B) Volume
(C) Mass
(D) Reactivity

Correct Answer: C

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Question (49)

QN007010

An atom has 16 protons and 18 neutrons. Its mass number is —

(A) 16
(B) 18
(C) 34
(D) 2

Correct Answer: C

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Question (50)

QN007011

Which of the following best defines mass number?

(A) Number of electrons in an atom
(B) Total number of protons only
(C) Total number of protons and neutrons
(D) Number of neutrons only

Correct Answer: C

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Question (41)

The difference between mass number and atomic number gives the number of —

Explanation:

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Question (42)

Which of the following has smallest mass number?

Explanation:

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Question (43)

If an atom has 29 protons and 35 neutrons, its mass number is —

Explanation:

Link:

Question (44)

The mass number of an atom depends mainly on the particles present in the —

Explanation:

Link:

Question (45)

Which notation correctly represents an atom with mass number 27 and atomic number 13?

Explanation:

Link:

Question (46)

An atom contains 13 protons and 14 neutrons. Calculate its mass number.

Explanation:

Link:

Question (47)

Which quantity remains unchanged if only electrons are removed from an atom?

Explanation:

Link:

Question (48)

The nucleus of an atom contributes most to the —

Explanation:

Link:

Question (49)

An atom has 16 protons and 18 neutrons. Its mass number is —

Explanation:

Link:

Question (50)

Which of the following best defines mass number?

Explanation:

Link:

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