Where should your head be when working with the fume hood?

If a || b and e || f, what is the value of y ?

How many moles are in 250 grams of tungsten (w)? * 4.4x10^23 moles 4.2x10^23 moles 0.7 moles 1.4 moles

Use the periodic table to determine the electron configuration of dysprosium (dy) and americium (am) in noble-gas notation.