RADIOACTIVITY.

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Presentation transcript:

RADIOACTIVITY

1. WHAT IS RADIOACTIVITY AN UNSTABLE NUCLEUS RELEASING PARTICLES OR ENERGY SOMETIMES CHANGES ONE ELEMENT INTO ANOTHER THE PROCESS IS CALLED NUCLEAR DECAY EX) URANIUM CAN TURN INTO LEAD!

2. WHAT IS NUCLEAR RADIATION THE MATTER OR ENERGY RELEASED DURING NUCLEAR DECAY THERE ARE FOUR MAIN TYPES EACH TYPE AFFECTS OTHER MATTER DIFFERENTLY

A. ALPHA PARTICLES MADE OF TWO PROTONS AND TWO NEUTRONS CAN BARELY PENETRATE PAPER THEY DO IONIZE MATTER

B. BETA PARTICLES MADE OF HIGH SPEED ELECTRONS CAN PENETRATE 3mm OF ALUMINUM OR 10mm OF WOOD THEY DO IONIZE OTHER MATTER A NEUTRON TURNS INTO A PROTON?

C. GAMMA RAYS STRONG FORM OF ELECTROMAGNETIC ENERGY (NOT A PARTICLE) CAN PENETRATE 60 cm OF ALUMINUM OR 7cm OF LEAD EASILY IONIZES MATTER (GREATER HEALTH HAZARD)

D. NEUTRON EMISSION MADE OF A NEUTRON CAN PENETRATE UP TO 15 cm OF LEAD! DOES NOT IONIZE OTHER MATTER

FOUR RADIATION TYPES TYPE SYMBOL CHARGE ALPHA PARTICLE 42He +2 BETA PARTICLE 0-1e -1 GAMMA RAY 00Y 0 NEUTRON EMISSION 10n 0