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Vocab
Vocabulary
| Term | Definition |
|---|---|
| Atom | a small particle that is the building block of matter. |
| Compound | a substance made of two or more elements that are chemically joined in a specific combination. |
| Element | a substance made only one kind of atom. |
| heterogeneous | a mixture in which the substance are not evenly mixed. |
| homogeneous | a mixture in which two or more substance are evenly mixed, but no bonded together. |
| Matter | anything that has mass and takes up space. |
| Mixture | matter that can vary in composition |
| Molecule | two or more atoms that are held together by chemical bonds and act as a unit. |
| Substance | matter with a composition that is always the same |
| atomic number | the number of protons in the nucleus of an atom of an element |
| electron | a negative charged particle that occupies the space in an atom outside the nucleus |
| electron cloud | the region surrounding an atom's nucleus where one or more electron are most likely to be found |
| ion | an atom that has a charge because it has gained or lost electron |
| isotope | one or more of the same protons but different numbers of neutrons. |
| neutron | an uncharged particle in the nucleus of an atom |
| nucleus | the region at the center of the atom. |
| poton | a positively charged particle with a nucelues. |
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