Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
PS Chapter 3:Atom
Leach Physical Science Chapter 3: Atom
| Term | Definition |
|---|---|
| law of electrostatic charges | The law that states that opposite electrical charges attract each other, while like charges repel each other. |
| plum pudding model | The atomic model developed by J.J. Thomson that views atoms as spheres of positively charged material with embedded electrons. |
| nuclear model | The atomic model developed by Ernest Rutherford in which an atom is made up of a tiny, dense, positively charged central nucleus surrounded by negatively charged electrons. |
| quantum mechanics | The branch of physics that explores the behavior of matter and energy at the atomic and subatomic level. |
| Bohr model | The atomic model developed by Niels Bohr in which electrons travel in distinct spherical regions called energy levels at fixed distances from the nucleus. |
| energy level | In the Bohr model of the atom, the regions located at fixed distances from the nucleus of an atom in which electrons are found. |
| quantum mechanical model | The currently accepted atomic model in which electrons are found in orbitals that are positioned around a nucleus that contains protons and usually neutrons. |
| electron | The smallest of the main subatomic particles, located outside the nucleus, having a negative charge and a mass much smaller than that of a proton. |
| proton | A subatomic particle found in the nucleus of an atom and having a positive charge and a mass slightly less than that of a neutron. |
| neutron | A subatomic particle found in the nucleus of most atoms that has no electrical charge and a mass slightly greater than that of a proton. |
| atomic number | The unique number of protons found in every atom of a particular element. |
| isotope | An atom of an element that has a different number of neutrons compared with other atoms of that element, resulting in a different mass number. |
| mass number | The total number of particles found in the nucleus of a particular isotope of an element. |
| ion | A charged atom or group of atoms that has gained or lost electrons, producing an unequal number of protons and electrons. |
| anion | A negatively charged ion. |
| cation | A positively charged ion. |
| atomic mass | The mass of an atom expressed in atomic mass units; the weighted average of the masses of all the naturally occurring isotopes of an element. |
| Saturnian model | The atomic model developed by Hantaro Nagaoka that had a massive and positively charged center surrounded by a flat ring of electrons |
Created by:
CoachLeach
Popular Physical Science sets