Question

Help please!!! Periodic Table question

Answer 1

On most periodic tables a single atomic mass is listed instead of the mass numbers for all the stable isotopes.How is this mass related to the different isotopes?

Answer 2

it is an average. say and atom has two stable isotopes one 25 amu with a 25% occurrence one one 30 amu with 75% occurrence to find the mass on the table you take 25amu*.25+30*.75=28.75 Amu.

Answer 3

Awh thankyou!!! your awesome @munkeyman1985

Answer 4

what does amu stand for? @munkeyman1985

Answer 5

atomic mass unit, it is the mass of one proton. it is relay the mass of carbon-12 divided by 12 that end up being about the mass of a proton.

Answer 6

atomic mass unit