Fill in the blanks with the word that best completes each statement. scientists develop knowledge by making about the natural world that may lead to a scientific question. a scientific question may lead to a(n) , which can be tested. the results of can lead to changes in scientific knowledge.

Why should the scientific method be used to answer a question? a. it provides a way to test an idea without any bias. b. it provides a way to test a hypothesis. c. it provides a way to ensure all hypotheses are proven correct. d. it provides a way to quickly turn a hypothesis into a scientific theory.

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.

If 90.0 grams of ethane reacted with excess chlorine, how many grams of dicarbon hexachloride would form