Counting the number of electrons in an atom
2 marks · HardSulfur has an atomic number of 16.
Calculate the number of electrons in two neutral atoms of sulfur.
Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.
Show answer
32
Also accept: There are 32 electrons in total; 16 electrons per atom, so 2 × 16 = 32
Common mistakes: Just writing 16 as answer; Multiplying incorrectly
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Marking points
M1 · 1 mark · Shows multiplying atomic number (16) by 2 to find total electrons. (follow-through)
A1 · 1 mark · Correct final answer: 32 electrons. (follow-through)
Worked solution
The number of electrons in one neutral atom of sulfur = atomic number = 16.
Two atoms: 2 × 16 = 32 electrons.