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What is the main difference between protons and neutrons?
O Protons have a much smaller mass than neutrons.
O Protons have a much larger volume than neutrons.
O Protons have an electrical charge, but neutrons have no charge
O Protons make up the nucleus, but neutrons orbit around the nu

The Answer is C, Protons have an electrical charge, but neutrons have no charge.

Explanation:

Protons are positively charged (+), while neutrons are neutral, meaning they have no charge.

The first two choices are incorrect because protons and neutrons are almost the exact same size, and the last choice is incorrect because both protons and neutrons make up the nucleus, electrons orbit the nucleus.

c.is a substance that requires a small amount of energy per gram to raise its temperature; has strong cohesive forces between molecules.

explanation:

a colorless, transparent, odorless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.

the answer you are looking for is d. there are no holes for blood to enter or leave the system. your welcome