Elements on the periodic table are arranged according to increasing , which is defined as the total number of

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (enter a whole number.) numerical answers expected! answer for blank 1:

How is energy related to the change of state represented by the model? atoms gain energy as a solid changes to a liquid. atoms gain energy as a solid changes to a gas. atoms lose energy as a solid changes to a liquid. atoms lose energy as a solid changes to a gas.