Please help me answer questions 3 & 65. 3. Oxidation is A. the loss of protons by an atom or molecule. B. the gain of oxygen by a cell. C. the loss of electrons from an atom or molecule. D. the loss of oxygen from a cell. E. The gain of electrons by an atom or molecule. 65. The atomic number of an atom or element is the number of A. neutrons in the nucleus. B. protons in the orbitals. C. Electrons in the nucleus. D. Neutrons in the orbitals E. Protons in the nucleus.

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Atoms and Molecules

An atom is the smallest unit of an element that possesses all the properties of that particular element. Molecules are the smallest unit of a substance that possess all the properties of that particular substance.