Science Unit B Crossword

2. A reaction where it loses energy.
7. an atom that becomes electrically charged because of its loss or gain of energy.
10. the horizontal row of elements in the Periodic Table
11. An experiment where the products and reactants are accounted for.
13. The principle where the mass will stay the same before and after because the reactants and products will be equal.
15. elements in the Table that is shiny, malleable, ductile element that can conduct electricity.
18. A Table where the elements are organized through their physical and chemical properties.
20. Element that has both metal and non-metal properties.
22. When a metal and non-metal combine.
23. Dull, brittle elements that do not conduct electricity.
25. The most stable and unreactive elements.

1. A chemical reaction where it forms a new substance and becomes exothermic.
3. A reaction where it gains energy.
4. The substance that helps a chemical reaction to proceed more quickly.
5. Where the electron orbits around the nucleus atom.
6. Elements in the Family that all have similar chemical families.
8. Measure of the atomic mass.
9. When two or more substances produce a new substance.
12. the smallest part of an element that is representative of that element.
14. When both non-metals combine.
16. An invisibly negative charge found in an atom. One of the subatomic particles.
17. The sum of the number of protons and neutrons in an atom.
19. The most reactive non-metals.
21. A type of organic catalyst found in the bodies of living things.
24. the vertical group in the Periodic Table of Elements.