Which term is defined as a measure of the average kinetic energy of the particles in a sample of matter?
(1) activation energy (3) temperature
(2) potential energy (4) entropy

it would be d. henry moseley

hope this !

and sorry if i'm late. have a good rest of your day! : d

c. orbital shape i hope this is correct

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.