Dalton's Atomic Theory states that:

the atoms of an element can have slightly different masses.

an atom is predominantly empty space.

matter is composed of small indestructible particles called.

atoms can be created and destroyed.

If Thomson had determined the charge-to-mass ratio of the electron to be 2.76 x 10¹¹C/kg, and Millikan had determined the charge of the electron to be 3.20 x 10¹⁹C, what would the mass of the electron be in grams? 

An atom contains 35 electrons. What must be the charge of the nucleus? (The charge of an electron is 1.60 x 10¹⁹C)