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vazorg [7]
2 years ago
13

Pls help me it detects if it’s right or wrong

Chemistry
1 answer:
Molodets [167]2 years ago
5 0

Answer:

Its C or A

Explain:

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Explanation:

Tc - 99 is technetium 99.

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Atomic number = number of protons = number of electrons in atom

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                      electron is 43

Mass number = number of protons + number of neutrons

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learn more:

Atomic number brainly.com/question/2057656

#learnwithBrainly

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