Question

The atom of an element has 4 protons, 4 electrons and 5 neutrons. What is its atomic number and mass number? Identify the element. ​

Answer 1

Answer:

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Explanation:

Element:Beryllium

mass no.9

atomic no.4

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Answer 2

Answer:

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• 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.