Radioactivity

The half-life of Iodine-131 is 8 days. What does this mean?

• The lifespan of Iodine-131 is 8 days

• Iodine-131 takes 8 days to become a radioactive material

• Iodine-131 takes 8 days to decay to half the amount of its original amount

• Iodine-131 takes days to become a non-radioactive material

Tags

NGSS.HS-PS1-8

Which of the following is a non-ionising radiation?

• X-ray

• Gamma Ray

• Microwave

• Beta Ray

Tags

NGSS.HS-PS4-4

Which of the following is true about M?

• It is neutral

• Has high penetrating power

• Has high ionisation power

• Used to control thickness of metal

Tags

NGSS.HS-PS2-5

"A random and spontaneous process where an unstable nucleus emits radioactive radiation until the nucleus becomes more stable.."

The statement above refer to...

• Half -life

• Nuclei decay

• Radioactivity

• Radioactive decay

Tags

NGSS.HS-PS1-8

Iodin-131 decays with half-life is 8 days to become Xenon-131. Calculate the mass of Iodin-131 after 24 days with a mass of 60g.

• 7.5 g

• 8.5 g

• 12.5 g

• 15.5 g

Tags

NGSS.HS-PS1-7

NGSS.HS-PS1-8

All examples below were radioactive substance, except for....

• Uranium-235

• Radon-222

• Thorium-234

• Carbon-16

Tags

NGSS.HS-PS1-8

Alpha particles.....

• are positively charged.

• consist of two protons and four neutrons.

• can penetrate any thickness of matter

• All of the above

Tags

NGSS.HS-PS1-8

When a nucleus undergoes gamma decay, the atomic number of the element....

• remains the same

• decreases by one.

• increases by one.

• increases by two.

Tags

NGSS.HS-PS1-8

The type of radioactive particle that can be stopped by a sheet of paper is the ____.

• alpha particle

• beta particle

• gamma ray

Tags

NGSS.HS-PS1-8

Negatively charged particles emitted from a nucleus at a high speed are ____.

• alpha particle

• gamma rays

• beta particles

Tags

NGSS.HS-PS1-8