4 | Periodic Table

Edit Answers
12345678910111213141516171819
Across
  1. 2. 1 fewer proton than He
  2. 3. 1 more proton than Na
  3. 5. 6 electrons orbiting its nucleus
  4. 7. 6 neutrons (usually)
  5. 8. 8 more protons than B
  6. 11. 2 more electrons than Mg
  7. 12. 2 fewer electrons than Be
  8. 15. 3 fewer protons than Ar
  9. 17. 20 electrons
  10. 18. 10 electrons
  11. 19. 9 protons
Down
  1. 1. its chemical symbol is K
  2. 4. 2 fewer electrons than Al
  3. 6. 6 more electrons than He
  4. 8. atomic mass number of 40
  5. 9. 3 fewer protons than Ne
  6. 10. 3 protons
  7. 13. 4 fewer protons than O
  8. 14. 3 fewer electrons than Ca
  9. 16. 16 protons