What is the change in the atomic number when an atom emits an alpha particle? a. decreased by 2 b. decreases by 1 c. increases by 1 d. increases by 2

Asa choose the correct set of reaction coefficients to properly balance the following chemical equation according to the law of conservation of mass: __s8 + __o2 ==> __so2 1, 1, 8 1, 8, 1 1, 8, 8 8, 1, 1

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

An observation that requires measurement is called quantitative observable or qualitative