Many of the physical properties common to metals;
1. less dense;
2. only one valence e-;
3. highly reactive;
4. react most readily with halogens;
5. reactivity increases as you move down the group,
6. react strongly with water;
7. can cut with a knife .
examples: Rb, Li, Cs
1. less dense;
2. only one valence e-;
3. highly reactive;
4. react most readily with halogens;
5. reactivity increases as you move down the group,
6. react strongly with water;
7. can cut with a knife .
examples: Rb, Li, Cs
alkali metals
Many of the physical properties common to metals
-harder, denser, stronger than alkali metals
-higher melting points than alkali metal
-less reactive than alkali, nonetheless too reactive to be found in nature as a free element;
examples: Ca, Mg, Be
-harder, denser, stronger than alkali metals
-higher melting points than alkali metal
-less reactive than alkali, nonetheless too reactive to be found in nature as a free element;
examples: Ca, Mg, Be
alkaline earth matals
-Relatively nonreactive due to a full valence shell
-all gases at room temp.
-Radon is the only gas that is radioactive at normal temperatures
-Helium is the lightest gas
-Neon is used in making lighted signs and displays.
examples: He, Ne, Rn
-all gases at room temp.
-Radon is the only gas that is radioactive at normal temperatures
-Helium is the lightest gas
-Neon is used in making lighted signs and displays.
examples: He, Ne, Rn
noble gases
