Chemical calculator: Difference between revisions
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;Introduction |
;Introduction |
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* A molecule consists of atoms. E.g. water, H2O, has two hydrogen atoms and one oxygen atom |
* A molecule consists of atoms. E.g. water, H2O, has two hydrogen atoms and one oxygen atom |
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* The mass of H2O is 1.008 * 2 + 15.999 = 18.015 |
* The mass of H2O is 1.008 * 2 + 15.999 = 18.015 |
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* An atom name consists of one upper-case letter followed by zero, one or two lower-case letters. |
* An atom name consists of one upper-case letter followed by zero, one or two lower-case letters. |
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** H ( |
** H (hydrogen) |
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** He ( |
** He (helium) |
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** Uue ( |
** Uue (ununennium) |
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* The number of atoms is stated behind the atom or atom group |
* The number of atoms is stated behind the atom or atom group |
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* An atom group is specified using parenthesis. E.g. |
* An atom group is specified using parenthesis. E.g. butyric acid, (CH3)2CHCOOH, has two CH3 groups |
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* A group may contain other groups, e.g. COOH(C(CH3)2)3CH3 |
* A group may contain other groups, e.g. COOH(C(CH3)2)3CH3 |
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