p4 revision 0.0 / 5 ? PhysicsRadioactivityGCSEAQA Created by: Riley WCreated on: 29-04-21 12:50 ATOM THE SMALLEST POSSIBLE PIECE OF AN ELEMENT . HAS A RADIUS OF 0.1 OR 1X10 TO THE POWER OF MINUS 10 1 of 19 NUCLEUS THE CENTRE OF AN ATOM . CONTAINS PROTONS AND NEUTRONS 2 of 19 PROTON A POSITIVLY CHARGED PARTICLE FOUND IN THE NUCLEAS AND HAS A REALATIVE MASS OF 1 3 of 19 NUETRAL NO OVERALL CHAGRE 4 of 19 ELECTRON A NEGATIVELY CHARGE PARTICLE FOUND IN ENERGY LEVELS (SHELLS) AROUND THE NUCLEAS . HAS A RELATIVE MASS OF 1 5 of 19 ELEMENT A SUBSTANCE MADE UP OF ONLY ONE TYPE OF ATOM E.G THE ELEMENT OXYGEN IS ONLY MADE UP OF OXYGEN ATOMS 6 of 19 ISOTOPE SAME NUMBER OF OF PROTONS DIFFERNT NUMBER OF A NEUTRONS 7 of 19 STABLE THE PROTONS AND NUETRONS ARE SECURELY STUCK TOGETHER IN THE NUCLEAS - WILL NO EDMIT RADIATION 8 of 19 UNSTABLE THE NUCLEAS MAY BREAK APART AT SOME POINT AND EDMIT RADIATION 9 of 19 EMIT MEANS TO "GIVE OUT" . NUCLEAR RADIATION IS EMITTED FROM THE NUCLEAS 10 of 19 RADIOACTIVE DECAY WHEN UNSTABLE NUCLEI BREAK APART EMITTING RADIATION 11 of 19 ACTIVITY THE RATE OF WHICH A SOURCE OF UNSTABLE NUCLUIE DECAYS AND ACTIVITY IS MEASURED IN BECQUERLS (BQ) 12 of 19 IONISATION AN ATOM LOSES OR GAINS AN ELECTRON THE CHARGERS ARE NO LONGER BALANCED AND THE CHARGED ATOM IS CALLED AN ION 13 of 19 PENTRATING POWER A MEASURE OF HOW EASY IT IS FOR READIOATION TO TRAVEL THROUGH DIFFERENT MATERALS 14 of 19 VACUUM WHERE THERE ARE NO PARTCILES (THE OBSENCE OF MATTER) 15 of 19 HALF-LIFE THE TME TAKEN FOR THE COUNT RATE TO HALVE /NUMBER OF RADIOACTIVE NUCLEI TO HALVE 16 of 19 CONTAMINATION WHEN RADIOACTIVE ISOTOPES AND UP ON OTEHR MATERIALS . A CONTAMINATED OBJECT WILL BE RADIOACTIVE 17 of 19 IRRADIATION IRRADTION IS EXPOSING AN OBJECT TO NUCLEAR RADIATION . THE IRRADIATED OBJECT DOES NOT BECOME RADIOACTIVE 18 of 19 STERILISE KILL MICTOOGANSIM ON AN OBJECT 19 of 19
Comments
No comments have yet been made