The relative molecular mass refers to the sum of the relative atomic mass of each atom in the chemical formula, and the unit is 1. Magnesium is a metal, generally in units of atoms, not to mention molecules, the relative atomic mass of magnesium is 24.
1. The relative molecular mass of magnesium
The relative molecular mass refers to the sum of the relative atomic mass of each atom in the chemical formula, and the unit is 1. Magnesium is a metal, generally in units of atoms, not to mention molecules, the relative atomic mass of magnesium is 24. For polymers, the relative molecular weight can reach tens of thousands or even hundreds of thousands; the chemical formula of the oxide with the smallest relative molecular mass is H2O.
2. Relative Molecular Mass Precautions
Relative molecular mass is numerically equal to molar mass, but in different units. The unit of relative molecular mass is “1”, while the unit of molar mass is g/mol; and the chemical formula of the oxide with the smallest relative molecular mass is H2O.
3. Relative Atomic Mass Calculation Formula
By “the mass of the atom is mainly concentrated in the nucleus”
The derivation formula for calculating the relative atomic mass can be obtained:
relative atomic mass
= Mass of an atom/mass of an atom of carbon (1/12)
=Nuclear mass+External electron mass/[(1/12]mC
≈Nuclear mass/(1/12)mC
= mass of proton + mass of neutron / (1/12) mC
=[number of protons*mass of a proton+number of neutrons*mass of a neutron]/(1/12)mC
=[number of protons*(1/12)mc+number of neutrons*(1/12)mC]/(1/12)mC
= number of protons + number of neutrons