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ch 17 vocab
kramer physics ch 17
| Question | Answer |
|---|---|
| atom | the smallest particle of an element that can be identified with that element. has protons and neutrons in a nucleus surrounded by electrons |
| element | substance made of only one kind of atom |
| brownian motion | the perpetual random movement of microscopic particles suspenced in a fluid |
| moleclue | the smallest particle of a substance consisting of two or more atoms of the same or different elements bonded together |
| compound | a chemical substance made of atoms of two or more different elements combined in a fixed proportion |
| chemical formula | a description that uses number and symbols of elements to describe the proportions of elements in a compound or reaction |
| nucleus | the positively charged center of an atom , which contains protons and neutrons and almost has all the mass of the entire atom |
| nucleons | the principle building block of the nucleus; a proton or neutron |
| neutrons | electrically charged particles that are of the two kinds of particles found in the necleus of an atom |
| protons | a postively charged particle that is one of the two kinds of particles found in the nucleus of an atom |
| isotope | a form of an element having a particular number of neutrons in the nuclei of its atoms |
| atomic number | total number of protons in the nucleus of an atom. |
| ion | an atom with an electrical charge , which is due to the loss or gain of electrons |
| shell of the modle atom | electrons that are pictured as orbiting in spherical shells around the neucleus |
| peridoic table | a chart that lists atoms by their atomic number and electron arrangements |
| plasma | a fourth phase of matter , in addition to soid liquid and gas. |
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hkramer
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