Radioactivity

Question 1

Antoine Henri Becquerel, Marie + Pierre Curie

Answer 1

Antoine: Nobel prize, 1903. Radioactivity through uranium
Curie’s: Nobel, 1903. Radioactivity: Radium and polonium

Question 2

How does unstable nuclei become stable

Answer 2

By releasing particles or waves of energy —-> radioactivity

Question 3

Three types of radiation (state the symbols)

Answer 3

Gamma, beta and alpha

Question 4

Three properties of the radiations

Answer 4

Penetrability, deflection and ionizing

Question 5

Penetrability status

Answer 5

alpha > beta > gamma (hardest = alpha, easiest = gamma)

Question 6

Deflection status

Answer 6

beta > alpha > gamma (beta + alpha are charged which means they are deflected by magnetic field in opposite directions, gamma is not charged) (alpha is less because of higher mass)

Question 7

Ionization status

Answer 7

alpha > beta > gamma

Question 8

What does ionization mean

Answer 8

Ability to strip electrons from atoms or molecules

Question 9

Radiation

Answer 9

Travelling particles or waves (non-ionizing [ low energy ], ionizing [ high energy ]

Question 10

Radioactivity

Answer 10

Property of certain elements to spontaneously emit radiation resulting from the breaking up or rearrangement of an atoms nucleus