Question

All stable atoms are made of ____?

-positively charged, with the number of protons exceeding the number of electrons
-negatively charged, with the number of electrons exceeding the number of protons
-neutral, with the number of protons equaling the number of electrons
-neutral, with the number of protons equaling the number of electrons, which is equal to the number of neutron

Answer 1

1. D. Charge-to-mass ratio of electrons was the same, regardless of the gas used.

2. Millikan

3. A. 1/840 the mass of a hydrogen atom

4. C. Neutral, with the number of protons equaling the number of electrons

Answer 2

C. neutral, with the number of protons equaling the number of electrons.
is the right answer
because number of neutrons vary from atom to atom