Why does a nucleus always have a positive charge?

pls answer or else I will give you up.

Nucleus has a positive charge as it has protons, which are positively charged inside it.

c, liquids evaporate, creating a gas

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the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl