Walter gets a paper back in lab with “-2.75% error” written on it. He had found the mass of an object to be 100.7 grams. What should he have found as the mass of the object

c. 75.7

i think that is the right

the increase of protons   hope this

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.