1. What pressure would be exerted by 46.0grams of hydrogen gas placed into a 3.00 L container at 25°C?

Which of the following statements is true? a. elements in the last period are radioactive. b. atomic weight is the same as atomic mass. c. elements in the same group have the same number of electron shells. d. atomic number equals the number of neutrons in the nucleus of an atom.

Ahypothesis must be testable and falsifiable to be considered scientific a. trueb. false

What type of electromagnetic waves does the human eye see as the colors red blue or green a visible light waves b radio waves c infrared waves d microwaves