When electrons are shared, the type of bonding is called

Why is an elements atomic mass not listed as a whole number on the periodic table

The density of an unknown gas at 98°c and 740 mmhg is 2.50 g/l. what is the molar mass of the gas with work showed?

Which type of orbits are found in the principal energy level n = 2 a - s b - s, f c - s, d d - s, p e - s, p, d