Foundational Chemistry

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Across
  1. 2. Electrical charge of the atom with an equal number of protons and electrons
  2. 3. This poisonous gas is given the chemical symbol ‘Cl’
  3. 7. The lightest element on the Periodic Table
  4. 9. A substance made of only one type of atom
  5. 10. The name of the ion formed when chlorine gains one electron
  6. 14. Particles inside the nucleus of an atom that have no charge
  7. 18. Name for the ‘ingredients’ of a chemical reaction
  8. 21. Mg2+
  9. 22. Name of the compound with the formula NaOH
  10. 25. Name for the substances that are produced in a chemical reaction
  11. 26. This number, found above an element on the Periodic Table, tells you the number of protons inside that atom
Down
  1. 1. Positively charged particle in the nucleus of an atom
  2. 4. This element has an electron arrangement of 2,8
  3. 5. Negatively charged particle that surrounds the nucleus of an atom
  4. 6. Number of atoms in a single H2SO4 molecule
  5. 8. Number of electrons in a sodium atom
  6. 10. Name of the compound with the formula CaSO4
  7. 11. This element has an atomic number of 8
  8. 12. Building block of all matter
  9. 13. This element is given the chemical symbol ‘K’
  10. 15. O2-
  11. 16. The middle of an atom is called this
  12. 17. The element has an electron arrangement of 2,8,3
  13. 19. Made of two or more elements chemically combined
  14. 20. The group number for an element with four electrons in its outer shell
  15. 23. Used to show the direction of a chemical reaction when writing equations
  16. 24. Table used to arrange all the known elements
  17. 27. This element has an atomic number of 6