Question

the weight of one atom of uranium is 238amu . It's actual weight in gram is

Answer 1

here the gram atomic weight is = atomic weight so the atomic weight is 238g

Answer 2

The atomic weight of one atom of Uranium (U) = 238 AMU.

AMU stands for Atomic Mass Unit. To determine the actual weight of an atom of Uranium (U) in grams we need to know the actual value of AMU.

$\begin{aligned} 1 A M U &=1.67 \times 10^{-27} \mathrm{kg} \\ &=1.67 \times 10^{-24} \mathrm{gm} \end{aligned}$

So,

With the 238 AMU of Uranium (U)

$\begin{aligned}=&\left(238 \times 1.67 \times 10^{-24}\right) g \\ &=397.46 \times 10^{-24} \mathrm{gm} \end{aligned}$

The weight of Uranium in gram is, $\bold{=397.46 \times 10^{-24} g m}$.