As each electron is removed, one at a time, from an atom of aluminum, more ionization energy is required. between which two successive ionization energies would you expect the greatest difference (largest change in value)? explain your answer in terms of attraction, repulsion, and electron arrangement.

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.

"record the time to complete a chemical reaction" would most likely be part of a lab procedure.