Enjoy ultimate casino experiences! Experience the biggest win in your life on DoubleU Casino! DoubleU Casino is a creative online casino, and we provide a number of fun slots and video poker games. A variety of high-quality slot games from Classic to the latest unique one give you ultimate fun you may have never experienced!
1 Nitrogen family elements often form covalent compounds, usually with the oxidation numbers +3 or +5. 2  Nitrogen and phosphorus are nonmetals. 3  Arsenic and antimony are metalloids. 4  Bismuth is a metal.
The halogen family is a group of reactive nonmetals. 1  Group 17 or VIIA. 2  Halogens. 3  7 valence electrons. 4  reactive nonmetals. 5  melting points and boiling points increase with increasing atomic number. 6  high electron affinities.