On This Day – April 29 : American chemist Harold Urey was born on this day in 1893

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Urey co-discovered deuterium (²H) with Ferdinand Brickwedde and George Murphy. They produced the first measurable samples of the isotope from liquefied hydrogen.

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What happened today in chemistry? Explore 366 days of chemistry history at On This Day in Chemistry.

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Specification

Scotland
- National 5
  - SQA Chemistry
    - Chemical changes and structure
      - Atomic structure and bonding related to properties of materials
        Periodic Table and atoms
        Isotopes are defined as atoms with the same atomic number but different mass numbers, or as atoms with the same number of protons but different numbers of neutrons.
        Most elements have two or more isotopes. The average atomic mass has been calculated for each element using the mass and proportion of each isotope present. These values are known as relative atomic masses.
Republic of Ireland
- Junior Cycle
  - Science
    - The nature of science
      - Science in society
        9. Research and present information on the contribution that scientists make to scientific discovery and invention and its impact on society.
        10. Appreciate the role of science in society; and its personal, social and global importance; and how society influences scientific research.
- Leaving Certificate
  - Chemistry
    - 1. Periodic table and atomic structure
      - 1.2 Atomic Structure
        Activities
        Calculation of approximate relative atomic masses from abundance of isotopes of given mass number (e.g. calculation of approximate relative atomic mass of chlorine).
        Depth of treatment
        Atomic number (Z ), mass number (A ), isotopes; hydrogen and carbon as examples of isotopes.
      - 1.3 Radioactivity
        Depth of treatment
        Distinction between chemical reaction and nuclear reaction (simple equations required - confine examples to alpha and beta emissions).

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