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Across 4. A number given on most periodic tables. The total number of protons and neutrons. (2 Words) 5. An atom or group of atoms that have gained or lost electrons to form a charged particle. 6. The subatomic particle with no charge but a mass of 1 a.m.u. 8. A row on the periodic table. 10. The electrostatic attraction between oppositely charged ions after the transfer of electrons. (2 Words) 11. The name given to the elements of Group 7. 12. The property of being able to be drawn out into wires. 13. The pattern shown in the properties across a range. 14. A number given on most periodic tables. Also called the proton number. (2 Words) 16. A mixture of metals. 17. The name given to the elements of Group 8 (or 0). (2 Words) 18. Versions of atoms with the same number of protons but different numbers of neutrons. 21. Shorthand for the numbers and types of atoms making up molecules or compounds. 22. The regular 3D arrangment of a giant ionic structure. 23. A way of describing the arrangement of the tiny particles that orbit the nucleus of an atom. (2 Words) 24. The process of splitting a molten or dissolved compound using a D.C. current.

Down 1. A charged particle formed of a group of atoms that have gained or lost one or more electrons. (2 Words) 2. A column on the periodic table. 3. The name given to the positive electrode. 7. The subatomic particle with a negative charge. 9. The average mass of all the isotopes of an element- considering their relative abundancies. (3 Words) 14. The name given to the elements of Group 1. (2 Words) 15. The property of being able to be hammered into shape. 19. The subatomic particle with a positive charge and a mass of 1 a.m.u. 20. The name given to the negative electrode.