Question

question 7 (1 point) isotope4. a fictional element has two isotopes. isotope a has a mass number of 32 and a natural abundance of 67%. isotope b has a mass number of 38 and a natural abundance of 33%. determine the atomic mass of this element. 32 35 38 34 36

Explanation:

Step1: Convert percentages to decimals

$67\% = 0.67$, $33\%=0.33$

Step2: Calculate weighted - sum

$32\times0.67 + 38\times0.33=21.44+12.54 = 33.98\approx34$

Answer:

D. 34