Question

the atom of an element is made up of 4 protons ,5 neutrons and4 electrons ​

Answer 1

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Answer:

beryllium

Explanation:

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

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Answer 2

The answer is berrylium
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