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Irina-Kira [14]
3 years ago
11

What is the mass number of a atom that has 4 protons 4electrons 5neutrons

Chemistry
1 answer:
user100 [1]3 years ago
4 0

Answer:

<h3><em>Please make sure to re-write this on your own so your teacher doesn't think that your cheating!</em></h3>

Explanation:

A neutral atom will have the same number of electrons does protons. Since it has 4 protons, it must have an atomic number of 4. (That will make it beryllium.) Since it has 4 protons and 5 neutrons, it has a mass number of 9.

So the answer is 9

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Based on Avogadro's principle, the coefficients in chemical equations involving only gases represent two types of quantities. Na
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