Review

3. The family of metals which are quite reactive, especially with water, and which have 2 valence electrons.
5. The family of elements that contains a solid, a liquid and a gas at room temperature and which react very easily with metals and hydrogen.
10. The family of metals that are very reactive and combine with halogens to form salts.
11. The family of gases which are very unreactive because their valence shell is filled.
13. Another name for a row on the periodic table?
14. what is the name of the last electron shell which is responsible for the reactivity of the element.

1. A column of elements from the periodic table that have similar properties.
2. The set of elements that have properties of both metals and non-metals.
4. This number indicates the number of protons and electrons in an atom of an element
6. Each item is designated by a one or two letter _____.
7. The name of the scientist responsible for creating the periodic table.
8. The set of elements that are dull, brittle, non-ductile and poor conductors.
9. The set of elements that are shiny, malleable, ductile and good conductors.
12. A “type” of atom; a pure substance that cannot be broken down or separated into simpler substances.