Magnesium is an alkaline earth metal with an atomic number of 12. it’s in the third row in the periodic table. which expression shows one way to find the number of valence electrons in one atom of magnesium? a. 12x3 b. 12/3 c. (12-8)-2 d. (12-2)+8 or e. (12+2)-8

If element x has 99 protons how many electrons does it have

Consider an ideal gas at 27.0 degrees celsius and 1.00 atmosphere pressure. imagine the molecules to be uniformly spaced, with each molecule at the center of a small cube. what is the length l of an edge of each small cube if adjacent cubes touch but don't overlap?

The unit of resistivity is the: ohm ohm-cm volt coulomb