Many hospitals use radioisotopes for diagnosis and treatment or in palliative care. three radioisotopes used in medicine are given. write the isotope symbol for each radioisotope. replace the question marks with the proper integers. replace the letter x with the proper element symbol.
a) iodine-131: b) iridium-192: c) samarium-153:

answer; i believe the correct answer is (c) /// is a homogeneous mixture of gaseous substance nitrogen,oxygen and smaller amounts of other substancesmixtures can be either ( homogeneous or heterogeneous)plz check first good luck

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.  

i have no clue hope you find the answer

because of all the things that happen around the us, many people get into arguments which sadly could get physical, but we should actually make a change for that.