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'si' does stand for any chemical element!!!!!

If you mean 'Si', then it is silicon.

NB For single letter elemental symbols are ALWAYS a CAPITAL letter.

For two letter elemental symbols, the first letter is always a capital letter amd the second letter is small /lower case. This is the International IUPAC standard, and as found in the Periodic Table.

Hence, silicon is 'Si' , not 'si'

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lenpollock

Lvl 16
3mo ago

What else can I help you with?