What is the chemical symbol for chlorine?

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

What is the chemical formula for ammonia?

What is the SI unit of power?

What is the name of the process where a gas changes directly to a solid without passing through the liquid phase?

What is the term for the point in a planet's orbit where it is farthest from the Sun?

Which planet is known as the "Red Planet"?

What is the term for the process by which rocks are physically broken into smaller pieces without changing their composition?

Which blood type is considered the universal donor?

According to Newton's third law of motion, if object A exerts a force on object B, what is the reaction?