Read the instructions and answer

laughing this question is a joke I think at first .

Explanation:

there are many mistakes : electrons are revolving in shell or orbits around the nucleus.

first shell always has two electron

after first shell , all shells contains eight electrons

electron have negative charge

proton have positive charge

nucleus have no charge

atom is neutral becoz the + charge of proton. and - charge of electron cancel each other's effect and atom is stable and neutral

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.