in the image, balls that look alike represent the same type of atom. the atoms have formed molecules. identify which molecules are elements, and which are compounds.

If you are in a chronic state of anxiety but also suffer from moment of sudden, intense fear you are problably suffering. from

Which of the following does not describe a physical property of iron? a iron is silvery-white or gray in color. b iron has a boiling point of about 3,000°c. c iron is a magnetic element . d iron and sulfur react to form iron sulfide.

The image below shows a common blood pressure gauge. what does this device do? a. measures the level of oxygen present in the blood b. measures the pressure of blood when the lungs expand and compress c. measures the electrical activity of the heart d. measures the pressure of blood when the heart contracts and relaxes