Across
- 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
Down
- 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