How many atoms are in 42.67 mole of copper?​

Achange in the number of neutrons in an atom will change an blank . when the number of protons changes in an atom, a new element will form.

What happens when an atom of sulfur combines with two atoms of chlorine to produce sci2? a. each chlorine atom shares a pair of electrons with the sulfur atom. b. an electron is transferred from each chlorine atom to the sulfur atom. c. an electron is transferred from the sulfur atom to each chlorine atom. d. each chlorine atom shares all its valence electrons with the sulfur atom.

How can the periodic table be used to predict the behavior of elements?