I can be accomplished, I can be impossible. I am the union of not a hit and an atom that has lost or found an electron.

I'm not right when alone. Two of me makes twenty. A threesome makes it dirty. What am I?

You walk into a room that contains a match, a kerosene lamp, a candle, and a fireplace. What would you light first?

56, 57, 7, 58 Equilibrium achieved. I am in what state?

I hold four quarts, but not a drop of blood, I can measure milk, or petrol, or a flood. Eight whole pints are packed inside my frame, What standard unit goes by my name?