y10 RC - U2: Radioactivity - QUIZ

Are these statements about ISOTOPES true or false?:

They have...

i) The same atomic number but different mass number

ii) The same number of protons but different number of neutrons

• i) True

  ii) False

• i) False

  ii) True

• i) True

  ii) True

• i) False

  ii) False

This Plutonium nucleus is formed by...

• 94 protons

  244 neutrons

• 94 protons

  150 neutrons

• 244 protons

  94 neutrons

• None of these answers is correct

Alpha decay or α-decay is a type of radioactive decay in which an atomic nucleus emits:

• a particle with 2 protons and 2 neutrons

• an electron (or a positron)

• a high energy form of electromagnetic radiation

• high energy neutrons

Beta decay or β-decay is a type of radioactive decay in which an atomic nucleus emits..

• a particle with 2 protons and 2 neutrons

• an electron (or a positron)

• a high energy form of electromagnetic radiation

• high energy neutrons

The radioactive process shown in the figure is...

• An alpha decay

• A beta decay

• A gamma decay

• Nuclear fusion

In this decay equation, the missing numbers for the Uranium nucleus are...

• 239

  94

• 235

  92

• 234

  93

• 243

  96

In this decay equation, the numbers missing for the Thorium nucleus are

• 231

  90

• 235

  92

• 235

  90

• 231

  92

In this decay equation, the numbers missing for the Nitrogen nucleus are:

• 14

  6

• 14

  7

• 13

  5

• 14

  5

In this decay equation, the numbers missing for Sodium nucleus are:

• 24

  12

• 24

  11

• 24

  13

• 25

  13

Gamma decay or ɣ-decay is a type of radioactive decay in which an atomic nucleus emits:

• a particle with 2 protons and 2 neutrons

• an electron (or a positron)

• a high energy form of electromagnetic radiation

• high energy neutrons