Shown below is an ion from a salt molecule. Which statement best explains the event?
This is hydration, which occurs during ionization.
This is hydration, which occurs during dissociation.
This is the formation of electrolytes during ionization.
This is the formation of ions from a covalent compound.

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Explanation:

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.

            and  

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.  

it would be a gas formation