Mass will increase as…

gravity decreases

gravity increases

number of particles increases

number of particles decreases

Mass will increase as number of particles increases.

Explanation:

As mass we designate the physical magnitude with which we measure the amount of matter that a body contains.  

Matter is composed of small particles called atoms.  As we increase the amount of particles of an object its mass increases.

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.