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Cambridge Secondary (7-9). Stage 9. MCE Science. Workbook - Unit 5: Chemical Bonding and Structure of Materials - Question 22

Cambridge Secondary (7-9) · Unit 5: Chemical Bonding and Structure of Materials

Question 22

Tick (✓) the correct answer.

What are outer electrons?
  1. Electrons closest to the nucleus of the atom
  2. Electrons in the second energy level of an atom
  3. Electrons in the highest energy level of an atom
  4. Electrons inside the nucleus
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