Two different gases are stored in separate closed containers. If both gases have a temperature of 50°C, which statement is true?
The thermal energies of gas molecules in the two containers are unrelated.
The gas molecules in both containers will absorb heat from the surroundings.
The molecules in one gas will transfer energy to the molecules in the other gas.
The gas molecules in both containers have the same average kinetic energy.

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.  

0.88m hope i am correct : )