The periodic table, atoms and ions

123456789101112131415
Across
  1. 1. The maximum number of electrons that the second and orbital can hold.
  2. 4. Tells us the number of protons in an atom. Will also be the number of electrons in that atom.
  3. 6. The table that organises elements by atomic number and properties.
  4. 7. A type of ion that has lost electrons and has a positive charge.
  5. 8. The smallest unit of an element that retains its properties.
  6. 10. The charged form of an atom.
  7. 12. The positively charged particle in an atom’s nucleus.
  8. 14. The two letter code for each element. Always starts with a capital letter.
  9. 15. A vertical column in the periodic table.
Down
  1. 2. The maximum number of electrons the first and last orbital can hold.
  2. 3. The total number of protons and neutrons in an atom.
  3. 5. The negatively charged particle that orbits the nucleus.
  4. 8. A type of ion that has gained electrons and has a negative charge.
  5. 9. The electrons that are found in the outermost orbital.
  6. 11. The horizontal rows in the periodic table.
  7. 13. The central part of an atom containing protons and neutrons.