Which Substance Can Be Broken Down by Chemical Means
Elements
Annotation that an chemical element:
- consists of only one kind of atom,
- cannot be broken downward into a simpler type of thing past either physical or chemical means, and
- can exist as either atoms (due east.g. argon) or molecules (e.m., nitrogen).
A molecule consists of ii or more atoms of the same element, or dissimilar elements, that are chemically bound together. Note that the two nitrogen atoms which comprise a nitrogen molecule move as a unit of measurement.
Compounds
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| Microscopic view of the molecules of the compound water (gas phase). Oxygen atoms are blood-red and hydrogen atoms are white. |
Annotation that a chemical compound:
- consists of atoms of two or more different elements leap together ,
- can be cleaved down into a simpler type of thing (elements) by chemical means (but not past physical means),
- has properties that are different from its component elements, and
- always contains the same ratio of its component atoms.
Mixtures
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| Microscopic view of a gaseous mixture containing two elements (argon and nitrogen) and a compound (h2o). |
Note that a mixture:
- consists of two or more different elements and/or compounds physically intermingled,
- tin can be separated into its components by physical ways, and
- often retains many of the properties of its components.
Source: https://www.chem.purdue.edu/gchelp/atoms/elements.html
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