A crossed aldol reaction was conducted under heated conditions. An NMR experiment of the reaction mixture was then performed and indicated the presence of both the addition and condensation products, as well as both unreacted starting materials. Select the two peaks that would be the best diagnostics signals representing the starting materials. Hint: You should perform a retrosynthetic analysis to determine what the starting materials are before looking at the NMR spectrum.

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.  

what are the statements

the answer is c

tell me if wrong

hypostyle hall;