Chemistry · Periodic Classification of Elements
Elements P, Q and R have atomic numbers 12, 14 and 16 respectively. Which one of the following statements about these elements is correct?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1R has four fewer protons than P so they are isotopes of the same element.
- 2P and R have the same number of valence electrons because their atomic numbers differ by 4.
- 3Q has two more protons than P and R has two more protons than Q.✓
- 4P, Q and R all belong to the same group because their atomic numbers differ by 2.
Correct answer
Q has two more protons than P and R has two more protons than Q.
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