An atom has 1 proton, 2 neutrons, and 1 electrons. what is the atomic number of the atom?

Electric charge is what ? a. kinetic energy b. radiation c. discovery d. electricity

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.

Select the correct location on the image identify the element that humans need to breathe. 2015 er r ights reserved