Which of the following statements is true about the
charges of protons and neutrons?
A Protons and neutrons have the same charge.
B. Protons have a positive charge and neutrons
have no charge
C Protons have a negative charge and neutrons
Thave a positive charge.

Explanation:

option B is the correct answer

100% sure

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.