1.) Calculate the pH of a solution formed by mixing 200.0 mL of 0.300 M NaHSO4 with 200.0 mL of 0.200 M Na2SO4 and 1.0 ml 1.00 M NaOH. The Ka2 for H2SO4
is 1.2 x 10^-2.

it's c. elements are placed in rows based on how may valencies electrons have.

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.