Solve One Step Equations An atom of niobium his a mass number of 93.
neutrons are in the nucleus of this atom ? An atom of phosphorus has
is protons and 15 neutrons in the nucleus. What is the mass of this isotope?

The modern periodic table has groups.

Which statements describe polyatomic ions? check all that apply. polyatomic ions have many charges. polyatomic ions have one overall charge. polyatomic ions repel other ions to form ionic bonds. polyatomic ions attract other ions to form ionic bonds. polyatomic ions are made up of only one type of atom. polyatomic ions are made up of two or more types of atoms.

(1.6 × 10-19)(5.0 × 106) = c × 10d identify the missing numbers below to show the result of multiplying the numbers.