Aresearcher is using a particle accelerator in an experiment studying isotopes. how can the researcher change one isotope into a different isotope of the same element? by removing valence electrons by adding valence electrons by adding or removing protons by adding or removing neutrons

by adding or removing neutrons

Explanation: Isotopes are the elements which have same atomic number but different mass number.

Atomic number is the number of electrons or number of protons in a neutral atom.Mass number is the sum of number of protons and the number of neutrons.

Thus changing the number of electrons would lead to formation of ions of the same element, change in protons would change the atomic number.

The mass number is changed by adding or removing neutrons.

For example, and   are isotopes of carbon element, containing 6 electrons and 6 protons each. The number of neutrons are 6 and 7 respectively.

you are the source of the heat energy. you can minimize the heat energy by selecting the appropriate clothes to wear.

the correct answer is 2 and 4