Anyone know the name to this​

The mass of a neutron is equal to the mass of a proton plus the mass of an electron. true or false false true

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.

What is a possible quantum number set for an electron in the 3s orbital of a magnesium atom