Which best describes the relationship of substance particles in my neutral atom

The number of protons equals the number of electrons

Explanation:

? you expect us to answer this? ? this is your schoolwork, i don't think we can with this, i think it would considering being

explanation:

let the different atoms be x and y. each with four protons and same mass will be represented as follows.

mass number is number of protons + number of neutrons.

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since, it is given that one has a negative charge while the other is neutral. therefore, there will be increase in number of protons and the atom will be represented as follows.

according to periodic table, mass number of beryllium is 9 and it has atomic number 4 so, the atoms will be and .  

the protons and neutrons will be located inside the nucleus whereas the electrons will be revolving around the nucleus.