Chemistry Crossword

1. A physical property calculated by mass divided by volume
5. A substance that helps a chemical reaction to proceed more quickly.
6. A pseudo science that involved turning things into gold
8. The person who came up with the current periodic table
9. A vertical column on the periodic table that have similar properties
11. Table A table that organizes the elements
13. A slow chemical change that occurs when oxygen in the air reacts with a metal.
15. Group 17 elements in the periodic table: the most reactive non-metals.
17. Gas to liquid
19. The process of losing heat to turn from a gas to a solid
20. A atom model developed by J.J. Thomson
22. A horizontal row on the periodic table
23. A change of state from liquid to a solid.
24. A neutral charged Elementary Particle that forms part of the Nucleus

2. A pure stance that can’t be separated any more, 118 of them
3. A physical property based on the Moh’s scale
4. metal The most reactive group of metals on the periodic table
7. The person who created the word Atom or Atomos
10. A unit used to measure atomic mass
12. A form of mixture, milk is one example
14. charge Happens to an atom when it losses or gains electrons
16. A negatively charged elementary Particle that moves in shells around the nucleus
18. Elements that don’t react much because of their equal numbered valence shell
21. The core or solid center of an atom
22. A positively charged Elementary Particle that is embedded in the Nucleus