Science Unit B Crossword

4. The most reactive non-metals.
6. the horizontal row of elements in the Periodic Table
9. When a metal and non-metal combine.
11. elements in the Table that is shiny, malleable, ductile element that can conduct electricity.
12. Where the electron orbits around the nucleus atom.
13. Measure of the atomic mass.
15. Element that has both metal and non-metal properties.
17. When both non-metals combine.
19. A Table where the elements are organized through their physical and chemical properties.
21. Dull, brittle elements that do not conduct electricity.
22. the smallest part of an element that is representative of that element.
24. The sum of the number of protons and neutrons in an atom.
25. The substance that helps a chemical reaction to proceed more quickly.

1. An experiment where the products and reactants are accounted for.
2. The principle where the mass will stay the same before and after because the reactants and products will be equal.
3. an atom that becomes electrically charged because of its loss or gain of energy.
5. A reaction where it gains energy.
7. A type of organic catalyst found in the bodies of living things.
8. When two or more substances produce a new substance.
10. A chemical reaction where it forms a new substance and becomes exothermic.
14. Elements in the Family that all have similar chemical families.
16. A reaction where it loses energy.
18. The most stable and unreactive elements.
20. An invisibly negative charge found in an atom. One of the subatomic particles.
23. the vertical group in the Periodic Table of Elements.