What is the chemical symbol for water?

Which of the following is a noble gas?

What is the pH level of pure water?

Which element is commonly used in pencils?

What is the main component of natural gas?

Which of these is a chemical change?

What is the formula for methane?

Which metal is liquid at room temperature?

What is the common name for sodium chloride?

 Which of the following is an example of a compound?