Which of the following is not a symbol used in chemical equations?

Explanation:

The following representations are the symbols that are being used in chemical equations.

- All representations of elements in the periodic table

- (s)  solid state

- (g)  gaseous state

- (l)  liquid state

- (aq) aqueus solution

- ∆  indicates the application of heat

- →← Forward and Backward direction

- ⇄ Reversible reaction

Anything outside these symbols are not being used in chemical equations.

a. a clone will be physically identical to the original, but won’t be genetically identical

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the number of valence electrons for each molecule or ion is shown beneath the structure. remember hydrogen will not have more than two electrons. this hydrogen is part of a covalent bond (sharing two electrons). a double bond here would cause hydrogen to share four electrons with phosphorus.