An atom W has 17 electrons and 18 neutrons. Which of the following representations of the atom is correct?

  • A 1718W
  • B 1817W
  • C 3517W
  • D 3518W
waec 2014chemistry

The correct answer is C. 3517W

The superscript is the atomic mass = 35

(The mass number also called atomic mass number or nucleon number, is the total number of protons and neutrons)

The subscript is the atomic or proton number = 17

The number of electrons in a neutral atom is equal to the number of protons.

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