Matter & Chemistry

1. most abundant nonmetal gases in the atmosphere
2. Mendeleev constructed the periodic table of elements
3. hardest of all known substances
6. simplest kind of atom
12. tiny group of 2 or more atoms that are bonded tightly together
15. anything that takes up space and has mass
16. the tiny particles that matter is composed of
17. study of what substances are made of and how one substance can be changed into another
18. metals metals in first far left column of periodic table

1. substances composed of more than one type of atom bonded together
4. type of chemical reaction that occurs whenever a substance reacts rapidly with oxygen
5. densest of everyday metals
7. substance that is made up of only one type of atom
8. amount of matter in one unit of volume
9. tiny particles that swarm at tremendous speed around nucleus of an atom
10. tiny extremely dense core at the center of an atom
11. number name for the number of protons in an atom
13. reaction process in which atoms of elements or compounds are rearranged to form new substances
14. only metal that is liquid at room temperature
15. elements toward left side of periodic table that tend to have lustrous silvery color and good conductors of heat/electricity