Aire contains 78 percent nitrogen 21 percent oxygen and one percent argon which gas is the solvent
oxygen
nitrogen
argon
none of the above

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom

In france, grapes are 1.95 euros per kilogram. what is the cost of grapes, in dollars per pound, if the exchange rate is 1.14 dollars/euro? (2.6)

What element has similar physical and chemical properties as boron.