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Voc. Wk #4 Atoms
| Question | Answer |
|---|---|
| nucleus | the region in the center of an atom where most of an atoms mas and positive charge is concentrated |
| matter | anything that has mass and takes up space |
| neutron | a neutral particle in the nucleus of an atom |
| atomic number | the number of protons in the nucleus of an atom of an element |
| atomic mass | then number of protons plus the number of neurtrons |
| pure substance | matter with a composition that is always the same |
| proton | the positive particle in the nucleus of an atom |
| molecule | two or more atoms that are held together by a covalent bonds and act as a unit |
| element | a substance that consists of only one type of atom |
| electron | a negatively charged particle that occupies the space in a atom outside the nucleus |
| atom | a small particle that is the building block of matter. |
| compound | substance containing atoms of two or more DIFFERENT elements chemically bonded together |
| Periodic Table | a chart of the elements arranged into rows and columns according to their physical and chemical properties |
Created by:
jschroeder4