The solvent in a solution evaporates out over time, leaving behind the solute. why is this a mixture? select all that apply.
a) the solution is made up of the solvent and solute
b) the solute does not evaporate bc it is heavy
c) distillation is a separation method that uses evaporation
d) the solvent and solute are deprecated by physical means

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.  

a physical change biology

explanation: