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How many oxygen atoms are in osmium tetroxide?

User Nbbk
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Answer:

4

Step-by-step explanation:

When naming covalent compounds, we use prefixes to represent the number of atoms present in one molecule. The prefixes (1-10) are as follow:

Mono-, Di-, Tri-, Tetra-, Penta-, Hexa-, Hepta-, Octo-, Nona-, Deca-

Notice that osmium does not have a prefix before it. This is because it's the first element that appears in the compound name, meaning that the prefix "mono-" will not be used. However, oxygen has the prefix "tetra-", which means there are 4 oxygen atoms in osmium tetroxide.

User Prasanna Talakanti
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