* 20 POINTS A is made of two or more elements chemically combined.

a.

alloy

b.

mixture

c.

element

d.

compound

20 pts ‼️ an unmanned spacecraft travels to mars. mars has a lower strength of gravity than earth. where in the image is the spacecraft’s weight the greatest?

Who determined the nature of chemical bonds?

Which substance—wood or silver—is the better thermal conductor? a thermal conductor is a material that requires very little heat energy to change its temperature. explain your answer.