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Question (31)

QN006992

Which of the following atoms has the greatest mass number?

(A) 6p, 6n
(B) 8p, 8n
(C) 10p, 12n
(D) 12p, 10n

Correct Answer: C

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Question (32)

QN006993

An atom has mass number 52 and atomic number 24. The number of neutrons is —

(A) 24
(B) 28
(C) 52
(D) 76

Correct Answer: B

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Question (33)

QN006994

Which quantity can be obtained if mass number and atomic number are known?

(A) Valency
(B) Number of neutrons
(C) Number of shells
(D) Density

Correct Answer: B

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Question (34)

QN006995

An atom contains 17 protons and 20 neutrons. Its mass number is —

(A) 17
(B) 20
(C) 37
(D) 3

Correct Answer: C

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Question (35)

QN006996

The total number of nucleons in an atom equals its —

(A) Atomic number
(B) Valency
(C) Mass number
(D) Electronic configuration

Correct Answer: C

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Question (36)

QN006997

Which atom has mass number 40?

(A) 18p and 20n
(B) 20p and 20n
(C) 10p and 30n
(D) 15p and 25n

Correct Answer: B

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Question (37)

QN006998

An atom has mass number 65 and atomic number 30. Number of neutrons is —

(A) 30
(B) 35
(C) 65
(D) 95

Correct Answer: B

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Question (38)

QN006999

The mass number of an atom changes if the number of —

(A) Electrons changes
(B) Protons or neutrons changes
(C) Shells changes
(D) Orbitals changes

Correct Answer: B

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Question (39)

QN007000

Which statement is correct for all atoms?

(A) Mass number is always equal to atomic number
(B) Mass number is always greater than or equal to atomic number
(C) Mass number is always fractional
(D) Mass number depends only on electrons

Correct Answer: B

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Question (40)

QN007001

An atom represented as ⁴⁰₂₀Ca has mass number —

(A) 20
(B) 40
(C) 60
(D) 80

Correct Answer: B

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Question (31)

Which of the following atoms has the greatest mass number?

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Question (32)

An atom has mass number 52 and atomic number 24. The number of neutrons is —

Explanation:

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Question (33)

Which quantity can be obtained if mass number and atomic number are known?

Explanation:

Link:

Question (34)

An atom contains 17 protons and 20 neutrons. Its mass number is —

Explanation:

Link:

Question (35)

The total number of nucleons in an atom equals its —

Explanation:

Link:

Question (36)

Which atom has mass number 40?

Explanation:

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Question (37)

An atom has mass number 65 and atomic number 30. Number of neutrons is —

Explanation:

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Question (38)

The mass number of an atom changes if the number of —

Explanation:

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Question (39)

Which statement is correct for all atoms?

Explanation:

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Question (40)

An atom represented as ⁴⁰₂₀Ca has mass number —

Explanation:

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