Question

Examine the block from the periodic table for the element nitrogen, chemical symbol N. Using your knowledge of the periodic table, which of these statements is correct about nitrogen?
A) All Nitrogen atoms have 7 protons.
B) The mass number of Nitrogen is 21.
C) All Nitrogen atoms have 14 protons.
D) Nitrogen atom has more protons than a Fluorine anion.
Eliminate

Answer 1

A) All Nitrogen atoms have 7 protons.  - correct answer

Explanation:

You find the nitrogen (N) in the group 15, period 2 of the periodic table. The the atomic number of nitrogen is 7 and from this we deduce that nitrogen have 7 protons and 7 electrons.

A) All Nitrogen atoms have 7 protons.  - correct

B) The mass number of Nitrogen is 21.  - incorrect, the mass number of nitrogen is 14.

C) All Nitrogen atoms have 14 protons.  - incorrect, all nitrogen atoms have 7 protons.

D) Nitrogen atom has more protons than a Fluorine anion. - incorect, fluorine (F) have an atomic number of 9 so it will have 9 protons, which is less than the number of nitrogen protons.

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