Which is the larger atom S or Mg

In the reaction between a crushed antacid tablet and vinegar what gas is emitted

What is the mass of 0.46 mol of mgcl2

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.