atomic mass造句怎么写

That is why this says atomic number, but for most intents and purposes we can say this could be atomic mass.

"Alpha particles have two positive charges and a mass of four atomic mass units; they are identical to helium nuclei. Though they are emitted at speeds about one-tenth that of light, they are not very penetrating and have ranges in air of about 1-4 in. (2.5-10 cm)."

The same man. Other classifications, Dobereiner People, remember, they were measuring atomic masses.

Mendeleev is the one who taught us that the properties of the elements are a function of the atomic mass.

I already showed you the atomic mass.

They have the same atomic number and hence nearly identical chemical behaviour but different atomic masses.