Which evidence is an indication that a chemical reaction has occurred? formation of a gas

melting of a substance

boiling of a substance

freezing of a substance

Which is true of transition metals when moving from left to right on the periodic table? the d sublevels are not filled across the period. the cation radii become larger across the period. atomic radii increase slightly and then start to decrease. atomic radii decrease slightly and then start to increase. o

If a bottle of olive oil contains 1.4 kg of olive oil, what is the volume, in milliliters ( ml ), of the olive oil?

Neils bohr believed that electrons orbited the nucleus in different energy levels, based on strong support from