How can rice and flour mixture be separated?

Answer/steps:

Take a beaker and sieve and place sieve on beaker

pour mixture onto sieve and shake

the flour will then fall into beaker and you will be left with rice in the sieve

because u need two or more forms of the same element that contain equal numbers of protons but different numbers of neutrons in their nuclei to form isotopes.

so since they all have the same shape? i mean maybe because m& m and reeses are both chocolates