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VikaD [51]
3 years ago
15

PLEASE HELP

Chemistry
1 answer:
andriy [413]3 years ago
6 0

The atomic mass of the element = 24.309547

<h3>Further explanation</h3>

Given

Isotopes of Mg

Required

The atomic mass

Solution

Atomic mass is the average atomic mass of all its isotopes  

Mass atom X = mass isotope 1 . % + mass isotope 2.% ..

The atomic mass of the element(Mg) :

= 23.98504 . 0.7870 + 24.98584 . 0.1013 + 25.98259 . 0.1117

= 18.876226 + 2.531066 + 2.902255

= 24.309547

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