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Cambridge Secondary (7-9). Stage 9. MCE Science. Workbook - Unit 4: The Structure of the Atom and the Periodic Table - Question 21

Cambridge Secondary (7-9) · Unit 4: The Structure of the Atom and the Periodic Table

Question 21

Which sentence best explains why atoms are neutral? Circle the correct answer.
  1. The number of electrons in an atom is the same as the number of protons.
  2. The number of electrons in an atom is the same as the number of neutrons.
  3. The number of neutrons in an atom is the same as the number of protons.
  4. The number of electrons in an atom is the same as the total number of neutrons and protons.
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