Based on your knowledge of atom models, which
location of the atom would look identical in a pair
of isotopes? which location would not look
identical? explain your answer in the space below!

number of molecules / avogadro's number * molecule molecular = mass

explanation:

we define a gram-molecular weight as the mass of one mole of any element or compound. a mole contains avogadro's number of units (molecules) –  

6.022

x

10

23

. so, dividing the number of molecules by avogadro's number gives us the number of moles. multiplying that by the molecular weight gives us the mass. from the periodic table we find the gram-molecular weight of u to be238 and of f to be19. so,  

u

f

6

will have a gram-molecular weight of 352g.

its first and third is your answer i did the qustion the fourth isnt right

the answer is a! (2.9 x 10^-18 j) hope i could someone. : )