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
9 Chem
| Term | Definition |
|---|---|
| Atom | the fundamental building block of all materials; it consists of a cluster of protons and neutrons surrounded by a cloud of electrons |
| Atomic model | scientists’ representation of an atom determined by experiment and indirect observation |
| Atomic number | the number of protons in a nucleus; the atomic number determines what type of atom it is |
| Atomic symbol | a short-hand notation for describing an atom; it consists of the chemical symbol, atomic number and mass number |
| Electron | a small, negatively charged particle; clouds of electrons surround the nucleus of an atom |
| Electron configuration | the number of electrons in each of the electron shells of an atom |
| Electron shell | part of the electron cloud; it is a layer that surrounds the nucleus and can only hold a certain number of electrons |
| Element | a substance made up of only one type of atom |
| Isotopes | atoms that have the same number of protons but a different number of neutrons in their nucleus |
| Mass number | the number of protons and neutrons in an atom |
| Neutral | having no overall charge |
| Neutron | a particle with no electric charge; it is found in the nucleus of an atom |
| Nucleus | a cluster of neutrons and protons at the centre of an atom |
| Proton | a positively charged particle in the nucleus |
| Carbon dating | a method for judging the age of fossils by analysing the amount of carbon-14 in the fossil |
| Dose (radiation) | the amount of radiation absorbed over a period of time |
| Electromagnetic radiation | radiation that travels through a vacuum as waves rather than particles |
| Half-life | the time it takes for half a sample of atoms to decay |
| Nuclear decay | when a nucleus undergoes a nuclear reaction and emits radiation |
| Nuclear radiation | rays or particles that are emitted by a nucleus during a nuclear reaction |
| Nuclear reaction | a process that causes a nucleus to change, including alpha decay, beta decay, fission and fusion |
| Radioactive | emitting radiation Radioisotope |
| Stable nuclei | nuclei that will never undergo a nuclear reaction |
| Unstable nuclei | nuclei that may undergo a nuclear reaction at any time |
| Alpha decay | a nuclear reaction in which a nucleus ejects an alpha particle |
| Alpha particle | a particle made up of two protons and two neutrons, making it identical to a helium nucleus |
| Alpha radiation | a form of ionising radiation made up of alpha particles |
| Beta decay | a form of nuclear reaction in which a beta particle is ejected from the nucleus |
| Beta particle | a small, negatively charged particle that can be ejected from a nucleus during a nuclear reaction; it is identical to an electron |
| Beta radiation | nuclear radiation that is made up of beta particles |
| Gamma decay | nuclear decay that involves the release of gamma rays |
| Gamma radiation | a form of ionising radiation made up of gamma rays |
| Gamma ray | a very high-energy electromagnetic wave that is produced when the protons and neutrons in a nucleus rearrange |
Created by:
Bsutton22
Popular Chemistry sets