Which of the following statements is not true statement? (a
An atom contains a large nucleus that is composed of protons, and neutrons.
b
Each element has a specific and unique atomic number.
c
Several elements make up an atom.
d
Isotopes of an element have the same number of protons and different number of neutrons.

Why do the strengths of london (dispersion) forces generally increase with increasing molecular size? choose one: a. heavier atoms have stronger attractions for each other than lighter atoms. b. dispersion forces are all equal in magnitude; there is no size dependence. c. dispersion forces arise from the attraction between the nuclei of atoms, and larger molecules have larger nuclei. d. dispersion forces arise from dipoles caused by the electron distribution being distorted. larger molecules have more electrons and, therefore, more distortions and a bigger force. e. dispersion forces depend on distance. larger molecules are farther apart and so the forces are smaller.