CHAPTER 8 FORM 3 RADIOACTIVITY

Three types of radioactive radiation, P, Q and R, are directed to sheets of paper, aluminum sheets and lead sheets. Which of the following rays is represented by P, Q and R?

• P : Alpha

  Q : Gamma

  R : Beta

• P : Beta

  Q : Alpha

  R : Gamma

• P : Gamma

  Q : Alpha

  R : Beta

• P : Gamma

  Q : Beta

  R : Alpha

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NGSS.HS-PS1-8

The table shows the half-lives of four types of isotope fluids emitting gamma rays. Which isotope of liquid is suitable for blood clotting detection?

• P

• Q

• R

• S

Which of the following statements is a characteristic of beta rays?

• Positively charged particles

• It is an electromagnetic wave

• Has higher ionization power than alpha

• Has lower penetrating power than gamma.

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NGSS.HS-PS1-8

Which radioactive material can be used to determine the age of a fossil?

• Iodin - 131

• Carbon - 14

• Radium - 226

• Uranium - 235

The diagram shows the deflection of two types of radioactive radiation in an electric field. What are the types of rays P and Q?

• P = alpha particles

  Q = gamma rays

• P = beta particles

  Q = gamma rays

• P = gamma radiation

  Q = alpha particles

• P = gamma radiation

  Q = beta particles

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NGSS.HS-PS3-5

The half-life of a type of radioactive material is 3 days. How much time does it take for 10 g of this material to decay until the remaining balance is 1.25 g?

• 3 days

• 6 days

• 9 days

• 12 days

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NGSS.HS-PS1-8

Among the following figures, who first discovered radioactive rays?

• Wilhelm Conrad Rontgen

• Antoine Henri Becquerel

• Marie Sklodowska Curie

• Pierre Curie

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NGSS.HS-PS1-8

Salah seorang daripada pengkaji awal bahan radioaktif iaitu Marie Sklodowska telah mati akibat kesan sampingan daripada kajian yang dilakukannya. Apakah penerangan yang tepat untuk sebab-sebab kematiannya?

• Telah termakan makanan yang tercemar dengan bahan radioaktif

• Menderita penyakit kanser darah kesan pendedahannya secara langsung dengan bahan radioaktif

• Mati akibat letupan bahan radioaktif di dalam reaktor

• Mati terhidu asap yang dibebaskan oleh bahan radioaktif

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NGSS.HS-PS1-8

Why is the atom in the diagram above said to be neutral?

• Has the same number of neutrons and protons

• Has the same number of electrons and protons

• Has neutrons in the nucleus that are neutral in nature

• Has electrons located outside the nucleus

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NGSS.MS-PS1-1

Why are ultra violet rays harmful to humans?

• Causes skin cancer if exposed to excessive exposure

• Has the same number of electrons and protons

• Causes embryonic defects in the womb

• Causes damage to the retina of the eye

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NGSS.HS-PS4-4