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mashcroft2002
mashcroft2002
02.04.2021 • 
Chemistry

The element Harrium has 3 isotopes. 82% of the isotopes are Harrium -12 . 10% are Harrium -13 and 8% are Harrium -14. What is the average atomic mass of Harrium ?

The element Abbium has 2 isotopes. 56% of the isotopes are Abbium -5. 44% are Abbium -6. What is the average atomic mass of Abbium ?​

The element Martinium has 2 isotopes. 32% of the isotopes are Martinium -77. 68% are Martinium -75. What is the average atomic mass of Martinium?

The element Annium has 2 isotopes. 71% of the isotopes are Annium -56. 29% are Annium -59. What is the average atomic mass of Annium ?

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