The characteristics of two different types of reactions are shown below: Reaction A: Protons are gained or lost by the atom of an element.
Reaction B: The identity of the reacting element does not change.

Which statement is true about the two reactions?

A. Valence electrons are not involved in both Reaction A and Reaction B.

B. Valence electrons are involved in Reaction B but not in Reaction A.

C. Valence electrons are involved in both Reaction A and Reaction B.

D. Valence electrons are involved in Reaction A but not in Reaction B.

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answer: c. the experiment shows that the red substance experienced a chemical change.

explanation: chemical change is the change in which chemical composition of the substance changes. physical change is the change in which there is no change in chemical composition.

chemical changes are accompanied by following changes:

a) precipitate formation

b) energy is released or absorbed

c) formation of bubbles

d) change in color

as it is given that the red color has disappeared and there is production of gas, it means the red substance has undergone a chemical change.

e

it is the most commonly accepted one

answer: i have one answer

acids are substances that ionize (break off) in an aqueous solution to produce hydrogen (h+) ions

explanation:

hope this and sorry i could only come up with one answer!