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ch. 17 vocab
carroll vocab. 17
| vocab word | definition |
|---|---|
| atoms | the building blocks of matter |
| element | a material composed of one type of atom |
| brownian motion | perpetual jiggling of particles that are just large enough to be seen |
| molecule | smallest particle of a substance consisting of two more atoms that bond together by sharing electrons |
| compound | substance made of atoms of different elements combined in a fixed proportions |
| chemical formula | chemical formula of compound tells the proportion of each kind of atom in |
| nucleus | all of an atoms mass is packed into the dense central region-nucleus |
| nuleons | building blocks of the nucleus |
| neutrons | nucleons in an electronically neutral state |
| protons | nucleons in an electronically charged state |
| isotopes | atoms of the same element having different numbers of neutrons |
| atomic number | the # of protons in the nucleus |
| ion | atom with a net charge |
| shell model of the atom | electrons are pictured as orbiting in spherical shells around the nucleus. |
| periodic table | chart that lists atoms by heir atomic number and by their electron arrangements |
| plasma | a phase where matter consists of positive ions and free electrons. |
Created by:
ellen 401
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