All of the following are evidence that a chemical reaction has occurred except
question 3 options:
a. color change
b. formation of a precipitate
c. bubbles of gas
d. all of the above are evidence of a chemical reaction

Find the protons, electrons and neutrons for strontium with a mass of 83

Draw metallic bonding if two copper

The chemical equation below shows the reaction of sodium (na) and chlorine (cl) to form sodium chloride (nacl). 2na + cl2 → 2nacl in this equation, which of the following is a reactant? i. sodium ii. chlorine iii. sodium chloride