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Basic Chemistry and Atomic Structure MCQs

Practice important Basic Chemistry and Atomic Structure MCQs with answers, explanations, theory links, and exam-focused preparation.

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Basic Chemistry and Atomic Structure

Basic Chemistry and Atomic Structure MCQs With Answers

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CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 26 and mass number 29. Number of neutrons is:
A. 4
B. 5
C. 2
D. 3
Correct Answer: D
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 25 and mass number 27. Number of neutrons is:
A. 2
B. 3
C. 1
D. 4
Correct Answer: A
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 24 and mass number 30. Number of neutrons is:
A. 6
B. 5
C. 8
D. 7
Correct Answer: A
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 23 and mass number 28. Number of neutrons is:
A. 6
B. 4
C. 7
D. 5
Correct Answer: D
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 22 and mass number 26. Number of neutrons is:
A. 5
B. 3
C. 6
D. 4
Correct Answer: D
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 21 and mass number 24. Number of neutrons is:
A. 4
B. 2
C. 5
D. 3
Correct Answer: D
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 20 and mass number 22. Number of neutrons is:
A. 4
B. 3
C. 1
D. 2
Correct Answer: D
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 19 and mass number 25. Number of neutrons is:
A. 6
B. 5
C. 7
D. 8
Correct Answer: A
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 18 and mass number 23. Number of neutrons is:
A. 5
B. 4
C. 6
D. 7
Correct Answer: A
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 17 and mass number 21. Number of neutrons is:
A. 3
B. 4
C. 6
D. 5
Correct Answer: B
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 16 and mass number 19. Number of neutrons is:
A. 2
B. 5
C. 3
D. 4
Correct Answer: C
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 15 and mass number 17. Number of neutrons is:
A. 4
B. 2
C. 3
D. 1
Correct Answer: B
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 14 and mass number 20. Number of neutrons is:
A. 8
B. 6
C. 5
D. 7
Correct Answer: B
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 13 and mass number 18. Number of neutrons is:
A. 6
B. 5
C. 4
D. 7
Correct Answer: B
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 12 and mass number 16. Number of neutrons is:
A. 3
B. 5
C. 4
D. 6
Correct Answer: C
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 11 and mass number 14. Number of neutrons is:
A. 3
B. 2
C. 5
D. 4
Correct Answer: A
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 10 and mass number 12. Number of neutrons is:
A. 3
B. 4
C. 2
D. 1
Correct Answer: C
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 9 and mass number 15. Number of neutrons is:
A. 5
B. 8
C. 6
D. 7
Correct Answer: C
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 8 and mass number 13. Number of neutrons is:
A. 6
B. 4
C. 7
D. 5
Correct Answer: D
N=A−Z.
CSS - PMS - CCE - PCS - Everyday Science Basic Chemistry and Atomic Structure
An isotope has atomic number 7 and mass number 11. Number of neutrons is:
A. 4
B. 5
C. 6
D. 3
Correct Answer: A
N=A−Z.
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