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Question (41)

QN007151

An atom contains 13 electrons and 14 neutrons. Its atomic number is —

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

Correct Answer: A

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Question (42)

QN007152

The number of neutrons in carbon-14 is —

(A) 6
(B) 8
(C) 14
(D) 20

Correct Answer: B

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Question (43)

QN007153

Which particle moves around the nucleus?

(A) Proton
(B) Neutron
(C) Electron
(D) Nucleon

Correct Answer: C

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Question (44)

QN007154

Rutherford’s alpha scattering experiment showed that atoms have —

(A) Distributed positive charge
(B) Dense central nucleus
(C) Only electrons
(D) No empty space

Correct Answer: B

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Question (45)

QN007155

An atom with 7 protons and 7 neutrons has mass number —

(A) 7
(B) 14
(C) 21
(D) 49

Correct Answer: B

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Question (46)

QN007156

Which particle is represented by the symbol e⁻?

(A) Proton
(B) Neutron
(C) Electron
(D) Nucleus

Correct Answer: C

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Question (47)

QN007157

The atomic number of chlorine is 17. The number of protons and electrons respectively are —

(A) 17 and 17
(B) 17 and 18
(C) 18 and 17
(D) 35 and 17

Correct Answer: A

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Question (48)

QN007158

The existence of nucleus was confirmed through —

(A) Cathode ray experiment
(B) Oil drop experiment
(C) Alpha scattering experiment
(D) Photoelectric experiment

Correct Answer: C

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Question (49)

QN007159

The mass number of an atom is 27 and atomic number is 13. Number of neutrons is —

(A) 13
(B) 14
(C) 27
(D) 40

Correct Answer: B

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Question (50)

QN007160

Which statement best describes atomic structure?

(A) Entire mass is spread uniformly
(B) Electrons and nucleus occupy equal space
(C) Atom has dense nucleus with electrons around it
(D) Atom contains only protons and neutrons

Correct Answer: C

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Question (41)

An atom contains 13 electrons and 14 neutrons. Its atomic number is —

Explanation:

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Question (42)

The number of neutrons in carbon-14 is —

Explanation:

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Question (43)

Which particle moves around the nucleus?

Explanation:

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Question (44)

Rutherford’s alpha scattering experiment showed that atoms have —

Explanation:

Link:

Question (45)

An atom with 7 protons and 7 neutrons has mass number —

Explanation:

Link:

Question (46)

Which particle is represented by the symbol e⁻?

Explanation:

Link:

Question (47)

The atomic number of chlorine is 17. The number of protons and electrons respectively are —

Explanation:

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Question (48)

The existence of nucleus was confirmed through —

Explanation:

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Question (49)

The mass number of an atom is 27 and atomic number is 13. Number of neutrons is —

Explanation:

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Question (50)

Which statement best describes atomic structure?

Explanation:

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