Answer :
The atomic mass unit (amu) is a standard for measuring the masses of atomic particles. In this problem, the atomic mass of an element is calculated by dividing the given weight by the weight of 1 AMU in grams. However, none of the provided options matches this calculated result of approximately 42 amu.
To solve this question, we need to know that 1 atomic mass unit (amu) is approximately equal to 1.66 x 10^-24 grams.
1. The weight of an atom of the element is given as 6.98 x 10^-23 g.
2. Now, in order to convert this mass from grams to atomic mass units (amu), we can use the conversion factor: 1 amu = 1.66 x 10^-24 g.
3. So by dividing the given mass of the atom by the weight of 1 amu in grams (6.98 x 10^-23 g / 1.66 x 10^-24 g/amu), we can get the atomic mass of the element in amu.
Using the division method, the atomic mass of the element comes out to be approximately 42 amu. However, this is not one of the provided options. It's likely an issue with the question or the options given, as none of the presented answers match the calculation result.
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