What are isotopes?
Name the scientist pictured on the right who is credited with the discovery in 1896 that uranium salts emit radiation - Leaving Cert Chemistry - Question 5 - 2005
Question 5
What are isotopes?
Name the scientist pictured on the right who is credited with the discovery in 1896 that uranium salts emit radiation.
Give an example of a radi... show full transcript
Worked Solution & Example Answer:What are isotopes?
Name the scientist pictured on the right who is credited with the discovery in 1896 that uranium salts emit radiation - Leaving Cert Chemistry - Question 5 - 2005
Step 1
What are isotopes?
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Answer
Isotopes are atoms of the same element that have the same atomic number (same number of protons) but different mass numbers. This means they contain a different number of neutrons. For example, carbon-12 and carbon-14 are both isotopes of carbon; while they share the same number of protons, they differ in the number of neutrons, resulting in different atomic masses.
Step 2
Name the scientist pictured on the right who is credited with the discovery in 1896 that uranium salts emit radiation.
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Answer
The scientist credited with this discovery is Henri Becquerel.
Step 3
Give an example of a radioactive isotope and state one common use made of this isotope.
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A common example of a radioactive isotope is Carbon-14. It is widely used in radiocarbon dating, which helps determine the age of ancient organic materials.
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