What is the general rule for which atom to write first in a molecule?

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What is the general rule for which atom to write first in a molecule?

2007-09-22 17:19:48 · 2 answers · asked by cutie_E 2 in Science & Mathematics ➔ Chemistry

2 answers

to correct the above answer, the cation is the ion with the positive charge, and it is usually first (left) in the formula

for organic molecules, usually you write C then H then list other elements alphabetically

2007-09-22 18:04:24 · answer #1 · answered by Anonymous · 0⤊ 0⤋

The anion (atom with the positive charge or the positive valance) goes first.

2007-09-23 00:32:19 · answer #2 · answered by cattbarf 7 · 0⤊ 0⤋