I’ll give ! an atom with an atomic number of 35 makes an ion with a negative 1 charge. a) which atom is this? explain how you know b) how many electrons does this ion have ? explain how you came to this answer

A. The atom is Bromine because Bromine has an atomic number of 35

B. This ion has 8 electrons. It is in the 7th group in the periodic table and has a negative 1 charge to it.

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.  

i dont know the answe