50
a section of the periodic table is shown below:

a portion of the first two columns of the periodic table is shown. column one from reads 11 sodium 22.990 and 19 potassium 39.098. column two reads 12 magnesium 24.305 and 20 calcium 40.078.

which of the following statements is true?
a .ca does not react with other atoms because it has 8 electrons in its outermost shell.
b. mg does not react with other atoms because its outermost shell is complete.
c. ca is more reactive than k because ca has to lose one more electron than k to complete its outermost shell.
d .mg is less reactive than na because mg has to lose one more electron than na to complete its outermost shell.