Question

Hydrogen has three isotopes with mass numbers of 1, 2, and 3 and has an average atomic mass of 1.00794 amu. This information indicates that
1. equal numbers of each isotope are present
2. more isotopes have an atomic mass of 2 or 3 than of 1
3. more isotopes have an atomic mass of 1 than of 2 or 3
4. isotopes have only an atomic mass of 1

Answer 1

Answer: The information indicates more isotopes have an atomic mass of 1 than of 2 or 3

Explanation:

Average atomic mass is defined as the sum of masses of each isotope each multiplied by their natural fractional abundance.

Formula used to calculate average atomic mass follows:

$\text{Average atomic mass }=\sum_{i=1}^n\text{(Atomic mass of an isotopes)}_i\times \text{(Fractional abundance})_i$

We are given:

Three isotopes of Hydrogen, which are H-1, H-2 and H-3

Average atomic mass of hydrogen = 1.00794 amu

As, the average atomic mass of hydrogen is closer to the mass of H-1 isotope. This means that the relative abundance of this isotope is the highest as compared to the other two isotopes.

Percentage abundance of H-1 isotope = 99.98%

Percentage abundance of H-2 isotope & H-3 isotope = 0.02 %

Hence, the information indicates more isotopes have an atomic mass of 1 than of 2 or 3

Answer 2

Answer:its actually 3 trust me

Explanation: