Formalin is . Group of answer choices another name for formaldehyde a plastic an excellent solvent a polymer an aqueous solution of formaldehyde

Two atoms interact with each other as shown by the equation. complete the equation by filling in the missing parts. 1 2 3 4 5 h he li

Which of the following is an indication that a substance has undergone a chemical change? a. no new product has been formed. b. the color of the substance has not changed. c. the original constitute has not changed. d. the molecular structure has changed.

One similarity and one difference between an element and a mixture of elements