unit B science project

1. any of a group of five nonmetallic elements with similar properties
5. a colorless, odorless reactive gas, the chemical element of atomic number 8
8. physical substance that which occupies space and possesses rest mass
9. the chemical element of atomic number 10, an inert gaseous element of the noble gas group
10. are substances that are made of only one type of atom
14. an irreversible chemical reaction
16. the chemical element of atomic number 55
17. a heavy, bluish-gray, soft, ductile metal atomic number 82
19. chemical element of atomic number 2
20. the number of protons in the nucleus of an atom
21. a gray, dense radioactive metal used as a fuel in nuclear reactors
22. the basic unit of a chemical element

2. the measurement for the weight of an atom
3. any of the gaseous elements helium, neon, argon, krypton, xenon, and radon, occupying family 18
4. characteristic of a substance
6. a chemical compound composed of ions held together by electrostatic forces strength or energy as an attribute of physical action or movement
7. a compound regarded as a union of molecules
11. any of the elements lithium, sodium, potassium, rubidium, cesium, and francium occupying Group 1 of the periodic table
12. a group of atoms bonded together (not ionic)
13. Workplace Hazardous Materials Information System
15. a heavy silvery-white metal that is liquid at ordinary temperatures.
18. substance that cannot be broken down into other substances; substance made up of only one type of atom