Which components of atoms has no charge

The answer is "neutrons." Neutrons have no charge although they are one of the main components to a atom. When the nucleus of the atom forms two  particles are formed with it and these are called protons, and neutrons. Remember that a proton has a negative charge, and a neutron has no charge.

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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.

it's all four options.