33) Hyperforin is an organic molecule with a molecular mass of 536.797 grams/mole, and is produced by a plant called St. John's wort. Hyperforin may been antidepressant properties in humans (though this is not known with certainty). Recently, chemists have reported the synthesis of hyperforin from inexpensive, small molecule precursors. How you could determine whether a sample of hyperforin was isolated from the St. John's wort plant, or produced by a synthetic chemist

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.  

bcde is the incorrect answer it is a