F5 Chapter 6.1 Radioactive Decay

β particle is same as

• Helium nucleus

• high speed electron

• hydrogen nucleus

• proton

Which of the following is match?

• A

• B

• C

• D

Which of the following below is correct?

• A

• B

• C

• D

When beta particle is emitted by a radioactive atom, what will happen to the nucleon number of the atom?

• increases by one

• stays the same.

• decreases by one

• decreases by four

What radioactive emission is given out by the source?

• Alpha particle

• Beta particle

• Gamma ray

• X-rays

What is the radioactivity of the material after 1 hour?

• 250

• 500

• 1000

• 2000

How many alpha and beta particle are emitted during this decay?

A radioactive element has a half-life of 20 hours. How long will it take for 75% of the atoms of the element to decay?

• 10hours

• 20hours

• 40 hours

• 80 hours

Cobalt-60 is often used in the sterilisation of medical products and equipment because it

• emits gamma rays.

• can be handle safely.

• has a long half-life

• can be detect by photographic film.

Which of the following radioisotopes A,B,C and D can use to detect the leaks from pipes underground?

• A

• B

• C

• D