periodic table

2. mass in grams of one mole of a substance.
5. its not a metal.
7. They are reactive nonmetallic elements that form strongly acidic compounds with hydrogen
9. a way of writing very large or very small numbers
11. a measurement of large quantities of very small entities
12. horizontal rows on the periodic table
13. a negatively charged ion
14. Has properties that are intermediate between those of metals and solid nonmetals or semiconductors.
17. a set of chemical elements in the same vertical column of the periodic table
18. line indicates the position of the metalloids in the Periodic Table

1. they are all odorless, colorless, monatomic gases with very low chemical reactivity.
3. a solid material that is typically hard, shiny, malleable
4. the outermost shell of the atom that determine an atom's or group's ability to bond with others
6. a positively charged ion
8. the mass of an atom of a chemical element expressed in atomic mass units.
10. a chemical rule of thumb that reflects the observation that main group elements tend to bond in such a way that each atom has eight electrons in its valence shell
15. when relating to an atom
16. an atom or molecule with a net electric charge due to the loss or gain of one or more electrons.