Which is an extensive property of iron
a magnetic
b black color
c mass of 15g
d density of 7.86 g/cm3

Mass of 15g; it's an extensive property because it depends on the amount of iron

Because electrons have negligible mass, to account for the mass of the isotope, there must be 16 neutrons, 16 neutrally charged, massive, fundamental particles present in the sulfur nucleus. and thus finally, if we have the 32s2− ion, there are 18 electrons, 16 protons, and 16 neutrons.

Perimeter? wheres the answers