Astudent noticed a yellow, solid, substance was formed when mixing two clear liquids during a lab. what term describes this yellow, solid substance?

It’s a chemical change because when two substances are mixed and they form something it’s chemical

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

idk what is it? is this a question that you know the answer or u dont