1
Q
What is the unit for measuring radioactivity?, what does it mean?
A
Becquerel (Bq)
1 Bq means one nucleus decaying per second
2
Q
The radioactivity of a sample always [ ] over time
A
decreases
3
Q
The [ ] a sample becomes, the less radiation it will emit
A
older
4
Q
What is a half-life?
A
A HALF-LIFE is the AVERAGE time it takes for the NUMBER of NUCLEI in a radioactive isotope sample to HALVE
5
Q
A short half life means the activity falls [ ]
A
quickly
6
Q
A half life is always the same period of time for a sample!
A
Did you know that?!!
7
Q
The half-life is found from the graph by finding the [ ] interval on the x axis corresponding to [ ] the activity on the y axis
A
time
halving
Real P2
flashcards
Decks in class (36)
# Cards
-
Velocity and Distance - Time Graphs7
-
Acceleration and Velocity - Time Graphs10
-
Weight, Mass and Garvity7
-
Resultant Forces9
-
Atomic structure7
-
Radioactivity and Background Radiation8
-
Ionising radiation12
-
Radiation dose7
-
Half-life7
-
Uses of radiation10
-
Radioactivity Saftey15
-
Nuclear Fission12
-
Nuclear Fusion5
-
The life cycle of stars9
-
Forces and Acceleration10
-
Frictional force and Terminal Velocity17
-
Stopping Distances14
-
Work Done4
-
Potential and Kinetic Energy6
-
Kinetic energy6
-
Forces and Elasticity6
-
Power2
-
Momentum and Collisions6
-
Car Design and Saftey22
-
Static Electricity12
-
Current and Potential Difference7
-
Circuits - the Basics7
-
Resistance and V=IR13
-
Circuit Devices11
-
Series Circuits9
-
Parallel Circuits7
-
Mains Electricity15
-
Electricity in the Home8
-
Fuses and Earthing22
-
Energy and Power in Circuits15
-
Power and Enegry Change6
