Calculate the total number of microstates and the entropy of a system with a volume of 10 m3, which is notionally divided up into 10,000 equal sized compartments and which contains one mole of an ideal monatomic gas. Now calculate the number of microstates and the entropy of the same system if the gas has expanded to fill 20 m3. Calculate the change of entropy for this system assuming the expansion was isothermal.

answer is a

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.