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Calculate the average atomic mass of element X using the table below. Then use the periodic table to identify the element. Separate your answers with a comma.

Calculate The Average Atomic Mass Of Element X Using The Table Below Then Use The Periodic Table To Identify The Element Separate Your Answers With A Comma class=

Sagot :

Answer:

126.8, Iodine

Explanation:

  • mass ×abundance/100
  • (126.9045×80.45/100)+(126.0015×17.23/100)+(128.2230×2.23/100)
  • 102.1+21.7+3=126.8

IODINE has an atomic mass of 126.8 or 126.9

Average atomic mass of X is 126.8 and the element is Iodine.

What is average atomic mass?

The average atomic mass of an element is the total of its isotope masses, each multiplied by its natural abundance.

Now, average atomic mass can be calculated by using the following formula,

[tex]Average\; atomic\; mass\\=\;(126.9045\;.\frac{80.45}{100} )\;+\;(126.0015\;.\frac{17.23}{100} )\;+\;(128.2230\;.\frac{2.32}{100} )\\=\;(126.9045\;.\;0.8045)\;+\;(126.0015\;.\;0.1732)\;+\;(128.2230\;.\;0.0232)\;\\=\;102.09467025\;+\;21.71005845\;+\;2.9747736\\=\;126.7795023\\=\;126.8[/tex]

Average atomic mass of X is 126.8.

Using the periodic table, the element can be identified by comparing their atomic mass.

Hence, the element is Iodine (I).

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