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Hydrogen
1
Lithium
1
Sodium
1
Potassium
1
Rubidium
1
Cesium
1
Francium
1
Helium
2
Beryllium
2
Magnesuim
2
Calcium
2
Strontium
2
Barium
2
Radium
2
Boron
3
Aluminum
3
Gallium
3
Indium
3
Thallium
3
Lanthanum
3
Actinium
3
Carbon
4
Silicon
4
Germanium
4
Tin
4
Lead
4
Nitrogen
5
Phosphorous
5
Arsenic
5
Antimony
5
Bismuth
5
Oxygen
6
Sulfur
6
Selenium
6
Tellurium
6
Polonium
6
Fluorine
7
Chlorine
7
Bromine
7
Iodine
7
Astatine
7
Group IA
1 valence electron
Group IIA
2 valence electrons
Group IIIA
3 valence electrons
Group IVA
4 valence electrons
Group VA
5 valence electrons
Group VIA
6 valence electrons
Group VIIA
7 valence electrons