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What is the atomic mass of an element with 8 protons and 9 neutrons? What is the atomic mass of an element with 20 protons and 21 neutrons? How many neutrons are found in an atom of Fluorine?
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What is the atomic mass of an element with 8 protons and 9 neutrons?

What is the atomic mass of an element with 20 protons and 21 neutrons?

How many neutrons are found in an atom of Fluorine?

User EoLithic
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Answer:

Calcium and 9

Step-by-step explanation:

User Daahrien
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