No-body 'invented' oxygen !
Oxygen is used in respiration.It act as last electron acceptor.
its on the downpipe its 2 nuts you have to unscrew
4
ctrl = for subscript ctrl shift = for superscript
potassium bromide - KBr iron (III) sulfate - Fe[subscript 2](SO[subscript 4])[subscript 3] copper (II) chloride - CuCl[subscript 2] tetraphosphorous heptanitride - P[subscript 4]N[subscript 7] ammonium carbonate - (NH[subscript 4])CO[subscript 3]
the subscript g after H2O indicates that it is water vapour, a gas, which is what the subscript g stands for. If there was a subscript s after the H2O, it would mean that H2O is in a solid form as ice. If there was a subscript l it means that H2O is in the liquid form as water.
You are not able to format a single character as subscript, but you can change the entire ledged text to subscript. Right-click on the ledged, select Font, and click on the Subscript option.
Not every chemical formula requires subscript. For example table salt is NaCl, sodium chloride. No subscript. But most chemical formulae do require subscript, such as water, H2O.
Subscript (:This is a subscript: (Na2) the "2" is the Subscript.
superscript 63 and subscript 152 Eu (the super and subscript go before the symbol with superscript on top of the subscript)
Click the Subscript button in the Font group of the Home tab.