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
Physical Science Ch3
The Atom
| Term | Definition |
|---|---|
| Ion | An atom or group of atoms that has a positive or negative charge. |
| Law of Electrostatic Attraction | Like charges repel and opposite charges attract |
| quantum mechanical model | the modern description, primarily mathematical, of the behavior of electrons in atoms |
| John Dalton | English chemist and physicist who formulated atomic theory and the law of partial pressures |
| Electron | English chemist and physicist who formulated atomic theory and the law of partial pressures |
| Proton | A subatomic particle that has a positive charge and that is found in the nucleus of an atom |
| atomic number | the number of protons in the nucleus of an atom |
| mass number | the sum of the number of neutrons and protons in an atomic nucleus |
| chocolate chip cookie model | J.J Thomsons model of an atom, in which he thought electrons were randomly distributed within a positively charged cloud |
| quantum mechanics | describes the motions of subatomic particles and atoms as waves |
| JJ Thomson | used the cathode ray tube to discover electrons |
| Ernest Rutherford | 1909-solar system model of the atom, gold foil experiment- fired negative ions at thin sheet of gold foil, discovered the atomic nucleus and proposed a nuclear model of the atom . |
| alpha particle | A cluster of 2 protons and 2 neutrons emitted from a nucleus in one type of radioactivity |
| Neutron | A small particle in the nucleus of the atom, with no electrical charge |
| atomic mass | The average mass of all the isotopes of an element |
| Anion | A negatively charged ion |
| Cation | an ion with a positive charge |
| Bohr Model | model of the atom in which electrons move rapidly around the nucleus in paths called orbits |
| energy level | a region of an atom in which electrons of the same energy are likely to be found |
| Democritus | Greek philosopher that said all matter is made of tiny particles called "atomos" or atoms |
| Orbitals | a region in an atom where there is a high probability of finding electrons |
| Isotope | An atom with the same number of protons and a different number of neutrons from other atoms of the same element. |
| Nuclear Model of the Atom | created by Ernest Rutherford. Replaced the Plum Pudding Model. Atom is like a miniature solar system with the positive particles in the middle and the negative particles orbiting as the planets do around the center. |
| emission spectrum | electron's emit certain bands of light when heated to high temperatures |
| Aristotle | matter is continueus, not made of discrete particles |
| Hantaro nagaoka | Saturnian model consisted of a massive positively charged center surrounded by a flat ring of electrons |
| what cant we know about electrons? What is it called | 1. Cant know where they are going and how fast they are going 2. Hisen burd model |
| has a +1 has-1 has 0 | 1. Protons 2. Electrons 3. Neutrons |
| 1. Found inthe orbitals 2. found in the neucles | 1. Electrons 2. Protons and Neutrons |
| unified atomic mass unit | The SI unit for atomic mass |
Created by:
MeiaW
Popular Physical Science sets