Assuming all three carbon atoms of glycerol are labeled as C14 radioisotopes and the radioisotope-labeled glycerol undergoes metabolism in animals. All of the following molecules in the animal may contain C14 radioisotopes EXCEPT: a. Pyruvate
b. Acetyl-CoA
c. Glutamine
d. Fattyacids
e. Oxaloacetate
f. All of the above molecules may contain C14 radioisotopes

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explanation:

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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.