A. I think sorry if it’s wrong
HM, I think the answer would be D. This is just a guess, so please use it if ou want to answer D it's ok :D
Answer:
1. Formation of a gas
2. Formation of precipitate
3. Liberation or absorption of heat, light, or some form of energy
4. Distinct change in color
<em><u>Hope this helps!</u></em>
<em><u>Please mark brainliest!</u></em>
A. Protons, neutrons, and electrons
I don’t understand the question