You are given an unknown element that is dull in color. all you have to identify it is an electrical source and a meter that detects electrical charges. you would know it is a nonmetal if you turn on the electrical source and

a. it heats up.
b. the meter shows it carries a charge.
c. it lights up.
d. the meter shows it does not carry a charge.

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

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