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6 Radioactivity

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Question 107
H

Two neutral atoms have the same total number of protons, neutrons and electrons. Atom P has 12 protons and 13 neutrons. Atom Q has 11 protons.

What is the neutron number of Q, and how does its approximate mass compare with P? Ignore electron mass.

[1]
A

14 neutrons; Q has approximately the same mass as P.

B

15 neutrons; Q has approximately the same mass as P.

C

15 neutrons; Q is heavier by one relative mass unit.

D

13 neutrons; Q is lighter by one relative mass unit.

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6 Radioactivity Questions

  1. GCSE
  2. /Physics
  3. /6 Radioactivity

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