Elements etc

Match it! Select the correct answer from the pull down...Good luck!

Atoms in a molecule are joined together by

Which of the following substances an example of a compound?

A chemical change always

Food cooks faster at higher temperature. This is because, as the temperature increases, the rate of a chemical reaction usually

Hydrogen is not longer used in balloons because it is too

Which of the following substances is NOT an element?

Which subatomic particles are found in the nucleus of an atom?

A mixture that can be separated with a magnet is