P4 atomic structure

Question	Answer
Atomic structure	Proton= mass 1 and charge 1+ Neutron= mass 1 and charge 0 Electron= 1/2000 and charge 1-
Atomic number Mass number	Atomic number- number of protons Mass number- number of protons + neutrons
Location in atom	Proton-nucleus Neutron-nucleus Electron-shell
Isotopes	Two atoms of the same number of protons but a different number of neutrons.
Ionisation	If an atom becomes an ion, it loses or gains an electron. If it loses an electron = 1+, if it gains an electron it becomes 1-.
Radioactive decay	If a substance is classed as radioactive it means that they are unstable and continuously gives out radiation at random intervals.
Becquerels	Amount of radioactive decay per second
Alpha radiation	Charge=2+, Mass=4 amu, least penetration but most ionising. Helium Nucleus
Beta radiation	Charge=-1, Mass= 1/2000, middle penetration out of the three, 2nd most ionising out if the three. Fast electron.
Gamma radiation	Charge=0, Mass=0 amu, most penetration and least ionising. Electromagnetic radiation.
Half life	The time taken for the radioactivity of specified isotope to fall to half life of its original value.

Resource summary

	Created by Joe Llewellyn over 5 years ago