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CH 2 Chem
10/30/25 Matter and properties.
| Question | Answer |
|---|---|
| 4 states of matter and definitions | solid - definite shape and volume liquid - definite volume but not shape gas - no definite shape or volume plasmas - an ionized gas |
| 2 ex. of a chemical property | Reactivity, corrosion, rust, flamibility |
| 2 ex. of chemical change | Explode, decompose, rust, oxidize, corrode, tarnish, ferment, burn, rot, digestion |
| 2 ex. of physical property | Density, color, odor, harness, melting point, boiling point |
| 2 ex. of physical change | Crumpling aluminum foil (Melting, condensing) *Changes of states |
| Difference between intensive and extensive properties | Intensive properties are independent of the amount of substance present. Extensive properties are dependent of the amount of substance present |
| What is matter? | Anything that has mass and takes up space |
| What is an atom? | Smallest particle of an element in the building block of all matter |
| What is an element? | A pure substance that can't be separated into simpler substances by physical or chemical means (and its made up of only one type of atom) |
| What is a compound? | A pure substance made up of two or more different elements that are combined chemically in a fixed ratio |
| What is a molecule? | A group of bonded atoms, which is one functioning unit |
| What is an example of a pure substance? | Table salt (Any elements and compounds) |
| What are two examples of an element? | Copper, oxygen, and gold, (anything on the periodic table) |
| 4 examples of a compound | Salt, baking soda, sugar, carbon monoxide |
| 4 examples of a heterogeneous mixture | Salad dressing, blood, dirt, milk, trail mix, concrete |
| 4 examples of a homogeneous mixture | Silver-mercury amalgam, lemonade, gasoline, steel, black coffee, air |
| What is an alloy? | A mixture of two metals |
| An element is always _____ all the way through | uniform |
| Can an element be separated into simpler materials? | No |
| Over 100 existing elements are listed and classified on the ______ | periodic table |
| Atoms are ______ combined in some way | chemically (oftentimes they come together to form groups of atoms called molecules) |
| Can compounds be separated by physical means? | No (separating a compound requires a chemical reaction) |
| What 2 elements make up CO2? | Carbon and oxygen |
| What are mixtures | Two or more substances not chemically combined |
| Mixtures can be uniform (called _______) and are known as solutions | homogeneous |
| Mixtures can also be non-uniform (called ______) | heterogeneous |
| Mixtures can be separated into their components by ______ means | physical |
| What are compounds | a pure substance containing two or more kinds of atoms |
| What are elements | a pure substance containing only one kind of atom in an element |
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