Nuclear Transformation

Question 1

Define NUCLEAR STABILITY

Answer 1

When the nuclear force (within the atomic) is greater than the electric repulsion

Question 2

When does NUCLEAR STABILITY disappear ? (2)

Answer 2

• nucleus is to large

- number of neutrons/protons decreases

Question 3

Define RADIOACTIVITY

Answer 3

A natural process where unstable atoms transform into one or more smaller, stable atoms

Question 4

What is the word used for the energy released in RADIOACTIVITY

Answer 4

Radiation

Question 5

Describe ALPHA PARTICLES (3)

Answer 5

• “heavy” positively charged
• helium nuclei
• low penetrating power

Question 6

Describe BETA PARTICLES (3)

Answer 6

• high energy electrons
• negatively charged
• medium penetration

Question 7

Describe GAMMA

Answer 7

• High intensity light
• neutral (no charge)
• very high penetrating power

Question 8

Define HALF-LIFE

Answer 8

Time required for half of a radioactive material to decay

Question 9

You have 5g of iodine. If iodine half life is 4 days. How many days till the iodine is 1.25g

Answer 9

8 days

Question 10

Define NUCLEAR FISION

Answer 10

Splitting apart a heavy element into lighter element

Question 11

Define NUCLEAR FUSION

Answer 11

2 smaller elements joining to make a heavier one

Question 12

(235) U —-> (141) Ba + (92) Kr
(2) H + (2)H —-> (4) He

Which is nuclear fission and nuclear fusion

Answer 12

1) fission

2) fusion