The scientist suggesting the presence electrons, or subatomic particles (smaller than atom) was a
Millikan
b
Dalton
С
8
Thomson
d
Rutherford

List four observations that indicate that a chemical reaction may be taking place

If the density of water is 1.0 g/cm3, which of these materials would float in water, based on their densities? check all that apply. aluminum cork iron lead wax

Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.