Which of the following is an example of a molecule?

F

C

Al

O2

What is the total number of protons in the nucleus of an atom of potassium-42?

Fill in the blank with the correct number to balance the equation: 4Cr + 3O2 → ___Cr2O3. (Enter only a whole number.) Numerical Answers Expected! Answer for Blank 1:

Which subatomic particle is electrically neutral and found in the nucleus of an atom?

Which of the following correctly describes a compound?

Which of the following elements in the third period would you expect to have the most negative electron affinity value, and why?

which one of these reactions is energy released? A all reactions B no reactions C endothermic reactions D exothermic reactions

Why do ionic compounds conduct electricity when dissolved in water but most covalent compounds do not?

Which of the following is an example of a molecule? F C Al O2

Organize the items listed into the proper sequence of events for gas exchange. a: O2 is transported to cells by circulatory system. b: O2 is drawn into the lungs during inhalation. c: Cells use O2 and generate CO2. d: CO2 is exhaled.

Research about the reaction of baking soda and vinegar