the mole concept :
a mole (mol) is defined as the amount of substance that contains as many atoms, molecules, icons, electrons or any other elementary entities as there are carbon atoms in exactly 12 gm of. the number of atoms in 12gm of is called Avogadro's number.
I'm not sure about muscular mass sorryyyy
S, Sulfur. An easy way to find the answer is simply looking at the last set of numbers.
I would say detailed drawing, but it is up to you
Answer:
Name: Magnesium
Atomic Number: 12
Atomic Mass: 24.305 atomic mass units
Number of Protons: 12
Number of Neutrons: 12