Isotopes

Last updated: 06/02/2020

AQA A-Level Chemistry Atomic structure Isotopes

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Question 1 of 25

1. Question
What is the definition of an isotope?
- 1. Atoms of the same element with a different number of protons and the same masses
- 2. Atoms of the same element with a different number of electrons and different masses
- 3. Atoms of the same element with a different number of neutrons and different masses
- 4. Atoms of the same element with a different electronic structure
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Question 2 of 25

2. Question
What is significant about the chemical property of isotopes?
- 1. Isotopes of the same element all react differently in chemical reactions
- 2. Isotopes of the same element all react the same in chemical reactions
- 3. Isotopes of the same element all react differently within acids
- 4. Isotopes of the same element reactivity depends on the number of neutrons
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Question 3 of 25

3. Question
Which of the following statements is true for an isotope?
- 1. They have different masses
- 2. They have the same number of neutrons
- 3. They have a different number of protons
- 4. They have a different electronic structure
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Question 4 of 25

4. Question
Which of the following statements is true for an isotope?
- 1. They have a different number of neutrons
- 2. They have a different number of protons
- 3. They have a different electronic structure
- 4. They have the same number of neutrons
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Question 5 of 25

5. Question
Which of the following statements is true for an isotope?
- 1. They have the same number of neutrons
- 2. They have a different number of protons
- 3. They have the same electronic configuration
- 4. They have the same masses
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Question 6 of 25

6. Question
Work out the number of protons, neutrons and electrons within $^{28}Mg_{12}$ ?
- 1. Protons – 12 Neutrons – 13 Electrons – 12
- 2. Protons – 14 Neutrons – 12 Electrons – 12
- 3. Protons – 12 Neutrons – 16 Electrons – 12
- 4. Protons – 16 Neutrons – 12 Electrons – 16
Correct

Incorrect
Question 7 of 25

7. Question
Work out the number of protons, neutrons and electrons within $^{85}Br_{35}$ ?
- 1. Protons – 34 Neutrons – 49 Electrons – 34
- 2. Protons – 32 Neutrons – 50 Electrons – 32
- 3. Protons – 35 Neutrons – 50 Electrons – 35
- 4. Protons – 50 Neutrons – 35 Electrons – 50
Correct

Incorrect
Question 8 of 25

8. Question
Work out the number of protons, neutrons and electrons within $^{45}Ar_{18}$ ?
- 1. Protons – 18 Neutrons – 19 Electrons – 18
- 2. Protons – 18 Neutrons – 27 Electrons – 18
- 3. Protons – 17 Neutrons – 26 Electrons – 17
- 4. Protons – 18 Neutrons – 18 Electrons – 27
Correct

Incorrect
Question 9 of 25

9. Question
Work out the number of protons, neutrons and electrons within $^{82}Se_{34}$ ?
- 1. Protons – 34 Neutrons – 48 Electrons – 34
- 2. Protons – 35 Neutrons – 48 Electrons – 34
- 3. Protons – 34 Neutrons – 46 Electrons – 34
- 4. Protons – 48 Neutrons – 48 Electrons – 35
Correct

Incorrect
Question 10 of 25

10. Question
Work out the number of protons, neutrons and electrons within $^{42}K_{19}$ ?
- 1. Protons – 19 Neutrons – 23 Electrons – 19
- 2. Protons – 18 Neutrons – 22 Electrons – 18
- 3. Protons – 17 Neutrons – 21 Electrons – 18
- 4. Protons – 20 Neutrons – 23 Electrons – 19
Correct

Incorrect
Question 11 of 25

11. Question
Work out the number of protons, neutrons and electrons within $^{20}O^{2-} _8$ ?
- 1. Protons – 8 Neutrons – 10 Electrons – 8
- 2. Protons – 10 Neutrons – 8 Electrons – 6
- 3. Protons – 12 Neutrons – 8 Electrons – 8
- 4. Protons – 8 Neutrons – 12 Electrons – 10
Correct

Incorrect
Question 12 of 25

12. Question
Work out the number of protons, neutrons and electrons within $^{17}O_8$ ?
- 1. Protons – 7 Neutrons – 9 Electrons – 6
- 2. Protons – 8 Neutrons – 9 Electrons – 8
- 3. Protons – 9 Neutrons – 8 Electrons – 8
- 4. Protons – 8 Neutrons – 8 Electrons – 10
Correct

Incorrect
Question 13 of 25

13. Question
Work out the number of protons, neutrons and electrons within $^{25}Na^+_{11}$ ?
- 1. Protons – 12 Neutrons – 14 Electrons – 9
- 2. Protons – 10 Neutrons – 10 Electrons – 12
- 3. Protons – 11 Neutrons – 14 Electrons – 10
- 4. Protons – 11 Neutrons – 12 Electrons – 11
Correct

Incorrect
Question 14 of 25

14. Question
Work out the number of protons, neutrons and electrons within $^{15}C_6$ ?
- 1. Protons – 7 Neutrons – 9 Electrons – 7
- 2. Protons – 8 Neutrons – 9 Electrons – 8
- 3. Protons – 6 Neutrons – 9 Electrons – 6
- 4. Protons – 9 Neutrons – 9 Electrons – 8
Correct

Incorrect
Question 15 of 25

15. Question
Work out the number of protons, neutrons and electrons within $^{38}Cl^-_{17}$ ?
- 1. Protons – 7 Neutrons – 9 Electrons – 23
- 2. Protons – 17 Neutrons – 18 Electrons – 16
- 3. Protons – 16 Neutrons – 20 Electrons – 17
- 4. Protons – 17 Neutrons – 21 Electrons – 18
Correct

Incorrect
Question 16 of 25

16. Question
Work out the number of protons, neutrons and electrons within $^{30}P_{15}$ ?
- 1. Protons – 16 Neutrons – 14 Electrons – 14
- 2. Protons – 15 Neutrons – 15 Electrons – 14
- 3. Protons – 14 Neutrons – 17 Electrons – 14
- 4. Protons – 15 Neutrons – 15 Electrons – 15
Correct

Incorrect
Question 17 of 25

17. Question
Work out the number of protons, neutrons and electrons within $^{30}Al^{+3}_{13}$ ?
- 1. Protons – 13 Neutrons – 17 Electrons – 10
- 2. Protons – 13 Neutrons – 16 Electrons – 13
- 3. Protons – 10 Neutrons – 10 Electrons – 16
- 4. Protons – 10 Neutrons – 20 Electrons – 12
Correct

Incorrect
Question 18 of 25

18. Question
Work out the number of protons, neutrons and electrons within $^{27}Na_{11}$ ?
- 1. Protons – 11 Neutrons – 16 Electrons – 11
- 2. Protons – 11 Neutrons – 15 Electrons – 11
- 3. Protons – 10 Neutrons – 13 Electrons – 10
- 4. Protons – 11 Neutrons – 16 Electrons – 16
Correct

Incorrect
Question 19 of 25

19. Question
Work out the number of protons, neutrons and electrons within $^{82}Br^-_{35}$ ?
- 1. Protons – 32 Neutrons – 36 Electrons – 37
- 2. Protons – 31 Neutrons – 46 Electrons – 35
- 3. Protons – 37 Neutrons – 47 Electrons – 36
- 4. Protons – 35 Neutrons – 35 Electrons – 34
Correct

Incorrect
Question 20 of 25

20. Question
Work out the number of protons, neutrons and electrons within $^8He_2$ ?
- 1. Protons – 2 Neutrons – 6 Electrons – 2
- 2. Protons – 4 Neutrons – 6 Electrons – 6
- 3. Protons – 6 Neutrons – 2 Electrons – 6
- 4. Protons – 4 Neutrons – 6 Electrons – 4
Correct

Incorrect
Question 21 of 25

21. Question
Work out the number of protons, neutrons and electrons within $^{20}N_7$ ?
- 1. Protons – 7 Neutrons – 13 Electrons – 7
- 2. Protons – 8 Neutrons – 13 Electrons – 7
- 3. Protons – 7 Neutrons – 7 Electrons – 7
- 4. Protons – 6 Neutrons – 12 Electrons – 6
Correct

Incorrect
Question 22 of 25

22. Question
Work out the number of protons, neutrons and electrons within $^{22}F_9$ ?
- 1. Protons – 9 Neutrons – 13 Electrons – 13
- 2. Protons – 8 Neutrons – 12 Electrons – 9
- 3. Protons – 8 Neutrons – 14 Electrons – 8
- 4. Protons – 9 Neutrons – 13 Electrons – 9
Correct

Incorrect
Question 23 of 25

23. Question
Work out the number of protons, neutrons and electrons within $^{215}At_{85}$ ?
- 1. Protons – 84 Neutrons – 130 Electrons – 84
- 2. Protons – 85 Neutrons – 130 Electrons – 85
- 3. Protons – 82 Neutrons – 82 Electrons – 130
- 4. Protons – 132 Neutrons – 84 Electrons – 84
Correct

Incorrect
Question 24 of 25

24. Question
Work out the number of protons, neutrons and electrons within $^{12}Be_4$ ?
- 1. Protons – 4 Neutrons – 12 Electrons – 4
- 2. Protons – 6 Neutrons – 8 Electrons – 4
- 3. Protons – 4 Neutrons – 8 Electrons – 4
- 4. Protons – 8 Neutrons – 8 Electrons – 9
Correct

Incorrect
Question 25 of 25

25. Question
Work out the number of protons, neutrons and electrons within $^{30}Al_{13}$ ?
- 1. Protons – 13 Neutrons – 17 Electrons – 13
- 2. Protons – 16 Neutrons – 13 Electrons – 16
- 3. Protons – 17 Neutrons – 12 Electrons – 16
- 4. Protons – 17 Neutrons – 13 Electrons – 13
Correct

Incorrect