What was the significance of the ""dashes"" or blank spots on mendeleev’s original periodic table?

The answer for this question is d. none of these

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

Answer the molar mass of magnesium is 24.305g/mol.

Ithink the answer is 10.576