C. The mass of an atom is greater than the combined masses of an atom's protons and electrons.
Existence of a neutron is predicted by Rutherford in 1920. So he explained difference between an atomic mass and an atomic number.
Covalent bonds consist of pairs of electrons shared by two atoms, and bind the atoms in a fixed orientation.
Answer:
I think it would be d.
Explanation:
Because it would just keep going until a force acts on it.
The following answers:
1. B
2. D
