The absolute temperature of a gas is increased four times while maintaining a constant volume. What happens to the pressure of the gas? Olt decreases by a factor of four. O It increases by a factor of four. 0 It decreases by a factor of eight. O It increases by a factor of eight.

increased stability in the completion of fluorine's outer shell.

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.  

10 years is the answer