conservation of mass

• What is 'conservation of mass'?

  "Mass cannot be created or destroyed". The mass of elements do not change because no mass is lost and no mass is added.
• What side are reactants in equations?

  Left
• What are diatomic molecules?

  when two atoms of an element are bonded together under normal conditions.
• Why are some atoms diatomic?

  as it is more stable for them.
• What are examples of diatomic molecules?

  Oxygen, Nitrogen, Hydrogen, Fluorine, Chlorine, Iodine, Bromine