If 3 g of element C combine with 8 g of element D to
form compound CD, how many grams of D are
needed to form compound CD2?

The atomic nucleus made up from protons (yellow) and neutrons (blue) and held together by nuclear forces. nuclear forces (also known as nuclear interactions or strong forces) are the forces that act between two or more nucleons. they bind protons and neutrons (“nucleons”) into atomic

Ijust took the quiz. their is no coefficient needed. : )