The side length of a square is n cm. Four students attempt to calculate the perimeter of the square on the board. -
Which statement is true?

1. Only Alicia and Diego's answers are equivalent.
2. Only Alicia and Chelsea's answers are equivalent.
3. Alicia, Bart, and Diego's answers are equivalent.
4. All four students have equivalent answers.

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.