How many electrons would be represented in the lewis dot notation for an atom of oxygen? a,2.b.6.c.8.d.18

In the 1800s, one of the statements in john dalton's atomic theory was that atoms are indivisible. later experimental evidence led to the discovery of subatomic particles such as neutrons, electrons, and protons. what happened to the indivisible atom part of dalton's atomic theory, and why?

What is the mass defect of a mole of nuclei with 1.8 x 10^15 j/mol binding energy?

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table