Each atom has 1 proton but the number of neutrons are different . What is it called

Arecipe calls for 1.2 cups of oil. how many liters of oil is this?

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Ican determine the molar mass of an element by looking on the under the atomic mass for the element. for example the molar mass of phosphorus is 30.974 grams/mole. avogadro’s number tells me the amount of representative particles in 1 mole of any substance. this means 12.011 gram sample of carbon and a 32.0 gram sample of sulfur have the same number of atoms.