Chapter 4 Elements, Compounds, & Mixtures. Salt Fields. Gold . Granite. Elements. Are pure substances that cannot be separated into simpler substances by physical or chemical changes. Elements are found on the periodic table of elements. Pure Substance.
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Examples: Copper, Lead, Tin
Examples: Sulfur, Bromine, Neon
Examples: Silicon, Antimony, Boron
Table salt- sodium and chlorine
Water- hydrogen and oxygen
1. An element is a pure substance that cannot be _________ into other substances.
2. Which two categories of elements are good conductors of electricity?
3. Elements are divided into three categories
4. Two or more elements that are chemically combined are called___________.
5. True or False
In order for elements to combine they must react or undergo a chemical change with another.
Example: A Pizza: dough, sauce, pepperoni, cheese, olives. They do not react when put together.
- Distillation is a process that separates a mixture based on its boiling point. (saltwater)
-Centrifuge separates according to the densities of the components. (blood)
-Magnet can separate iron from aluminum.
1. Are elements, compounds, or both.
2. Separated by physical means.
3. They keep original properties.
1. Are elements.
2. Lose their original properties.
3. Separated by chemical means.Mixtures vs. Compounds
particles are dispersed
throughout but are not heavy enough to settle to the bottom. The particles are small and fairly well mixed.
2. True or False
Mixtures can be physically separated.
3. The __________ is the substance that is dissolved, and the _________is the substance that dissolves.
4. Solubility is how much __________ can be dissolved.
5. A snow globe is an example of a ______.
6. A ________is a fairly well mixed mixture which the particles are not heavy enough to settle out.