Which element has the same number of electrons in the outermost energy level at Lithium?

Much of the general structure and physical properties of the interior of the earth are inferred from: a)deep oil and gas bore holes b)geologic investigations c)analysis of seismic waves d) study of volcanoes

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o c?

What shape would a molecule with two bound groups and two lone pairs have?