Assignment Nuclear Physics

Isotopes of same element have different _______________.

• symbols

• number of protons

• number of electrons

• number of neutrons

Which of these processes describes a nuclear fusion reaction?

• A nucleus absorbs energy to produce lighter nuclei

• A nucleus splits to produce energy and lighter nuclei

• Two nuclei bind together to produce energy and heavier nuclei

• Two nuclei bind together to produce energy and a lighter nuclei

When does radioactive decay occur?

• When the nucleus of an isotope is unstable

• When the nucleus of an isotope is stable

• When the electrons of an isotope are spinning

• When the electrons of an isotope are shared with another isotope

Which type of nuclear radiation is being emitted here?

• Alpha

• Beta

• Gamma

Which type of nuclear radiation is being emitted here?

• Alpha

• Beta

• Gamma

Carbon-12 and Carbon-14 are isotopes of carbon. What is the difference between Carbon-12 and Carbon-14?

• Number of protons

• Number of neutrons

• Number of electrons

How much strontium-90 will remain after 100 years if the initial amount is 4.0 g? The half-life of strontium-90 is 25 years.

• 0.16 g

• 0.25 g

• 0.50 g

• 2.0 g

Nuclear fission and nuclear fusion release a huge amount of energy, E as shown in the picture above. What is m?

• Critical mass

• Mass defect

• Total mass before nuclear reaction

• Total mass after nuclear reaction

The statements below are the safety precautions taken when using radioactive materials except

• radioactive waste has to be solidified and buried deep underground

• handling radioactive materials with forceps

• wearing a film badge in handling radioactive materials

• storing radioactive materials in wooden boxes labelled with radioactive symbol