What is the chemical symbol for chlorine?

Which gas, abundant in the atmospheres of Uranus and Neptune, gives these planets their blue-green color?

Which gas is commonly used for refrigeration?

Which star, located in the constellation Canis Major, is the brightest star in the night sky?

Which of the following is a common property of metals?

Which of the following is an example of a double displacement reaction?

Which moon of Neptune is the coldest known object in our solar system, with surface temperatures close to absolute zero?

What is the function of the nucleus in a cell?

What is the chemical symbol for copper?

What is the primary component of natural gas?