Which gas has the greatest kinetic energy at STP? O He
O 02
O Ar
O None of the above (All have the same kinetic energy.)

Chemistry worksheet - i am not sure what they are asking for exactly?

Reduction is a reaction which results in a in electrons and a in positive charge of the atom or ion 1) a- loss 1) b- gain 2) a-increase 2) b-decrease

If e is the symbol for an element, which two of the following symbols represent isotopes of the same element? 1. e2. e3. ea.1 and 2c.1 and 4b.3 and 4d.2 and 3