Answer:
4- radioactive isotopes
Explanation:
I don't remember exactly but this question was on the regents
X is the chemical symbol of the element
Number of moles = mass of product / molecular mass
=mass of product (MgO) / 40.3
Since the mass of MgO is not given in the question, the correct answer choice cannot be given. However, proceeding witht eh above formula will enable you to find the correct number of moles given the mass of MgO.
The solute has to be hydrophilic, (water loving).
I would say the last one because unlike beta and alpha rays they will have no effect on the mass or atomic number because they are just composed of high energy radiation
