An atom of potassium has 19 protons and 20 neutrons. what is its mass number?

Is laundry detergent an acid or a base?

The number of neutrons is equal to the atomic number minus the atomic mass. a. true b. false

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.