What is radioactivity?
Name the three types of radiation associated with radioactive substances - Leaving Cert Chemistry - Question a - 2011
Question a
What is radioactivity?
Name the three types of radiation associated with radioactive substances.
Which is the most penetrating of these radiations?
(i) Marie ... show full transcript
Worked Solution & Example Answer:What is radioactivity?
Name the three types of radiation associated with radioactive substances - Leaving Cert Chemistry - Question a - 2011
Step 1
What is radioactivity?
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Answer
Radioactivity is the spontaneous random decomposition (disintegration or decay) of the nuclei of an atom. This process occurs naturally as unstable atomic nuclei emit radiation in order to reach a more stable state.
Step 2
Name the three types of radiation associated with radioactive substances.
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Answer
The three types of radiation associated with radioactive substances are:
Alpha (α) radiation
Beta (β) radiation
Gamma (γ) radiation
Step 3
Which is the most penetrating of these radiations?
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Answer
Among these types of radiation, gamma (γ) radiation is the most penetrating. It can pass through various materials, including human tissue, requiring dense materials like lead or several centimeters of concrete for effective shielding.
Step 4
Name both radioactive elements.
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Answer
The two radioactive elements isolated by Marie Curie are:
Radium (Ra)
Polonium (Po)
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