An atom is made up of protons and neutrons (both found in the nucleus) and electro (irl the surrounding electron cloud), The atomic number i$ erupt to th e bomber of pr The mass number is equal to the plumber protons plus neutirons, in a neutral atom . number of protons equals tho number of electrons. The charge on an ion indicates ( ,moalance between protons and electrons. Too many electrons produc .-marge. too positive charge. 'hls structure Carl be wriitern as part of a chemical symbol.

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Explanation:

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boiling point is the temperature at which the vapor pressure of the liquid equals atmospheric pressure. the vapor pressure of solvent molecules is decreased when a solute is added, so a higher temperature is required to increase the number of solvent molecules in the gas phase above the liquid.

at the freezing point, the vapor pressures of the solid and liquid are equal; a lower temperature is needed to reduce the number of solvent particles above the liquid.

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tobey

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