What type of bond is involved when a metal from groups 1 or 2 bond with a nonmetal from groups 16 or 17

Agas diffuses 1/7 times faster than hydrogen gas (h2). what is the molar mass of the gas? 100.10 g/mol 98.78 g/mol 86.68 g/mol 79.98 g/mol

At 450 mm hg a gas has a volume of 760 l, what is its volume at standard pressure

How are the terms group and period used on the periodic table