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This combination of symbols does not occur on the periodic table, which is a list of individual elements. Of course the separate symbols do occur.

S is sulfur

I is iodine

O is oxygen.

It's a rather random collection of elements, so I wonder if you might mean SiO2 (where the 2 should be a subscript) which is the formula for the compound silicon dioxide, a major constituent of sand. As a compound this does not appear on the Periodic Table.

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8y ago
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13y ago

SiO2 is Silicone Dioxide.

It is also known as Silica, and is a primary component of glass.

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13y ago

The scientific name for SiO2 is Silicon Dioxide although the name usually used to refer to it is Silica. Silica is a sand that is used in glass making and many other things.

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14y ago

Its the formula of the mineral Quartz

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11y ago

Silicon Diaxode

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13y ago

SiO2- Silicon Dioxide

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Q: What does SIO stand for on the periodic table?
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