can scientists actually measure the mass and relative abundance of isotopes of an element by counting each particle and measuring their masses? [ i think no because it would be too small ]

Question

if not, how could a scientist measure the mass and relative abundance of isotopes of an element? [ please help me! ]

thanks for helping me
have a happy halloween! :D

One can gassify the element, ionize it, then accelerate it in an accelerator, differing masses will move differently.

Or

one can vibrate the atoms in a changing (oscillating ) electric field, and find resonance. Different masses resonate at different frequencies.

or other methods.

what is honors chemistry? sounds hard

Honors Chemistry is another name for advanced placement (AP) chemistry.