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When you have two different elements, there are usually only two words in the compound name. The first word is the name of the first element. The second word tells you the second element and how many atoms there are in the compound. The second word usually ends in IDE. That's the suffix.
Do elements, mixtures and compounds consist of atoms or molecules ? Answer in words: Elements can consist of either atoms or molecules but if molecules then those molecules are formed only from atoms of the same type (that is, atoms of the same element). For example, a molecule of oxygen consists of two atoms of oxygen and has the chemical formula O 2 where O is the chemical symbol of the element oxygen.