without looking at the periodic write the outer electron configuration for the group 12 (2b) element in the fifth period.

Which is true of the reactants in this displacement reaction? fe + 2hcl fecl2 + h2 a. the reactants are located to the left of the arrow in the chemical equation. b. the reactants contain 1 iron atom, 2 hydrogen atoms, and 1 chlorine atom. c. the reactants are the atoms, molecules, or compounds formed in the reaction. d. the reactants have the same physical and chemical properties as the products.

How many moles of magnesium is 3.01 x10^22 atoms of magnesium?

What is the mass of 8 moles of sodium atoms