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Evaluation

Cloze Activity

Read the paragraph below and fill in the missing words.

Radioactivity takes place in the of an atom unlike reactions that take place in the levels involving

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DropDown Activity - The alpha (α) particle has the following main characteristic:

Read and complete -

The alpha (α) particle has the following main characteristic:

α is charged(like protons),has mass number and atomic number therefore equal to a charged atom ( 42He2+) ,have very penetrating power and thus can be stopped /blocked/shielded by a thin sheet of

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Multi-select -

Question

Select all those statements are true to are characteristics of Beta decay.

Answers

is negatively charged(like electrons)

has  no mass number  and atomic number  negative one(-1)  therefore equal to a fast moving electron (0 -1e)

have medium  penetrating power and thus can be stopped /blocked/shielded by a thin sheet of  aluminium foil.

have medium  ionizing power thus cause  less  damage to living cells than the α particle.

a nuclide undergoing β -decay has its mass number remain the same  and its atomic number increase by 1

is neither negatively charged(like electrons/beta) nor positively charged(like protons/alpha) therefore neutral.

has  no mass number  and atomic number therefore equal to   electromagnetic waves.

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Scrambled List -

Order the words to make a sensible sentence

  • Radioactivity
  • is
  • the
  • spontaneous
  • decay
  • of an unstable nuclide
  • an
  • unstable
  • nuclide

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Right!

Sorry... The right answer is:

True-False Question

study the following statements  or equations seriously  and make the correct choice

Question 1

A nuclide is said to be stable if its neutron: proton ratio is equal to one (n/p = 1)

Question 2

The following is a beta decay

238  92 U                  ->      23088 Ra       +       2 42He 2+

SCORM Quiz - summary questions - choose one correct answer

Question

gamma radiations have very what ionizing power

Answers

High

low

fast

slow

Question

Which decay/radiation is represented by the red line?

Answers

Alpha

Beta

Gamma

x-ray

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