Element, Compound, Mixture
When An Element Forms A Compound...
It loses its properties as it is being combined with another element to form a substance.
It has a completely different set of physical and chemical properties than the elements that formed it.
Since it is being separated back to the origional elements those elements will keep their own unique attributes.
Contrasting Elements and Compounds
Similarities: 1. At the lowest levels elements and compounds are both composed of atoms; 2. Compounds and elements are both pure substances that cannot be separated by physical means; and 3. Elements and compounds are homogeneous in that they have the same composition ratio of elements throughout the sample.
Differences: Elements are the simplest forms of matter- Compounds are substances that can be separated into simpler substances