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Sedbober [7]
2 years ago
14

What is the mass number of an atom containing 4 protons and 5 neutrons

Chemistry
1 answer:
Lapatulllka [165]2 years ago
7 0
Mass number = number of protons + number of neutrons
Mass number = 9
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3 years ago
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weeeeeb [17]

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Explanation:

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How are the conditions at which phases are in equilibrium represented on a phase diagram?

Image result for How are the conditions at which phases are in equilibrium represented on a phase diagram?

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