Problemas
17. Identify the element based on the following values for its three isotopes: 179.947 amu (0.12% ) 181.948 amu (26.50% ) , 182.950 amu (14.31% ) 183.951 amu (30.64% ) 185.954 amu (28.43% )
Roztwór
Victoria
élite · Tutor durante 8 años
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Respuesta
To identify the element based on its isotopic masses and abundances, we calculate the **weighted average atomic mass** of the element. The formula for the weighted average atomic mass is:
### Step 1: Convert Percent Abundances to FractionsThe given percent abundances are converted into fractional abundances by dividing each percentage by 100:-
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### Step 2: Multiply Each Isotopic Mass by Its Fractional AbundanceNow, multiply each isotopic mass by its corresponding fractional abundance:1.
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### Step 3: Add the ResultsAdd all the contributions from each isotope:
### Step 4: Identify the ElementThe calculated weighted average atomic mass is approximately **183.93 amu**, which corresponds to the element **Tungsten (W)** on the periodic table.### Final Answer:The element is **Tungsten (W)**.