Atomic structure

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Across
  1. 3. The number of protons in an atom.
  2. 4. Metals with electrons in the d-subshells
  3. 5. A model of electron arrangments that proves electrons can only exist at specific distance from the nucleus.
  4. 6. Metals with electrons in the f-subshells.
  5. 8. Electronegativity goes up as this goes down.
  6. 10. The ability of an atom to attract electrons in a bond.
  7. 13. An atom that has lost electrons.
  8. 14. An atom that has gained electrons.
  9. 15. A horizontal row on the periodic table.
  10. 18. A region in an energy level where electrons are likely to be.
  11. 19. Particles that make-up protons and neutrons.
  12. 20. Carrier of the nuclear strong force.
Down
  1. 1. The amount of energy required to remove an electron from an atom.
  2. 2. A region where a maximum of 2 electrons can be present.
  3. 7. The most distant electrons from the nucleus.
  4. 9. This force holds together the nucleus.
  5. 11. The number of protons and neutrons in an atom.
  6. 12. Atoms of the same element with different numbers of neutrons.
  7. 16. Carrier of the electromagnetic force.
  8. 17. A vertical column on the periodic table.