All Atomic structure articles – Page 5
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ResourceOn This Day - Apr 30 : Discovery of the electron
Thomson was studying the properties of cathode rays, and found that they were over 1,000 times lighter than the hydrogen (H) atom and that they were the same mass irrespective of the parent atom. He called these particles “corpuscules”, but scientists later dubbed them “electrons”.
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ResourceOn This Day - Feb 29 : Bohr issued bowl of balls
Danish physicist Niels Henrik David Bohr made fundamental contributions to the understanding of atomic structure and quantum mechanics, for which he received the Nobel Prize in Physics in 1922.
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ResourceOn This Day - Apr 25 : Wolfgang Pauli was born
He is most famous for the Pauli “exclusion principle”, which states that in an atom no two electrons can occupy the same quantum state simultaneously. He was awarded the Nobel Prize in Physics in 1945 for his work.
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ResourceOn This Day – Jul 24 : Sir James Chadwick died
He received the Nobel Prize in Physics 1935 for his discovery of the neutron, a subatomic particle with zero electrical charge. Neutrons are found in the nucleus of all elements (except hydrogen) along with protons, which carry a positive charge.
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ResourceOn This Day - Oct 20 : James Chadwick was born
By bombarding the element beryllium (Be) with alpha particles, he discovered a neutral particle in the atom’s nucleus - the neutron. Chadwick subsequently led the UK’s research team investigating the atomic bomb in World War II.
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ResourceOn This Day – Sep 19 : Chemical structure defined
Chemical structure refers to the way atoms are arranged within molecules. Butlerov realised that chemical compounds are not a random cluster of atoms and functional groups, but structures with definite order.
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ResourceOn This Day - Jul 09 : Ben Mottelson was born
Together with Aage N. Bohr and James Rainwater, Mottelson developed models of the atomic nucleus that considered the effects of internal structure on properties such as charge distribution. The trio won the 1975 Nobel Prize in Physics.
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ResourceOn This Day - Mar 07 : The atomic nucleus revealed
The New Zealand chemist explained that when firing alpha particles at a thin sheet of gold, some particles bounced back. From this he deduced an atom has a hard, dense, positively charged centre: the nucleus. Related resources: Understanding how atoms are made up Royal Institution Christmas Lectures® 2012: ...
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ResourceOn This Day - Jun 07 : Robert Mulliken was born
He won the 1966 Nobel Prize in Chemistry for developing the molecular orbital theory. Mulliken carried out the “fundamental work concerning chemical bonds and the electronic structure” used to determine the molecular structure of a compound.
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ResourceOn This Day - Oct 07: Niels Bohr atom
He described the atom as a miniature solar system with electrons revolving around a heavy nucleus. He received the 1922 Nobel Prize in Physics for “his services in the investigation of the structure of atoms and of the radiation emanating from them.”
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ResourceOn This Day - Oct 04 : Kenichi Fukui was born
His career was devoted to explaining the nature of chemical reactions. He shared the 1981 Nobel Prize in Chemistry for his investigation into the mechanisms of chemical reactions. Specifically, this was for his work on the role of frontier orbitals, which have loosely bonded electrons.
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ResourceOn This Day - May 03 : George Thomson was born
Thomson shared the Nobel Prize in Physics in 1937 with Clinton Davisson for their discovery of the wave properties of electrons when diffracted by crystals. He was the son of Nobel laureate Joseph John Thompson.
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ResourceOn This Day – Aug 02 : Discovery of positrons
He was examining chamber photographs of cosmic rays when he realised that the tracks orientation revealed the existence of positively charged particles too small to be protons. These sub-atomic particles have the same mass as an electron, but with a positive charge.
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Resource28 chemistry puzzles for 14-16 years
Use these sudoku-inspired puzzles with printable worksheets and answers to help 14–16 year olds consolidate their understanding of key chemical concepts.
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Resource45 chemistry puzzles for 16-18 years
Try these chemistry puzzles based on sudoku to help 16–18 year old students consolidate their knowledge about key topics, with printable worksheets and answers.
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FeatureChemical Bonding
A masterclass in teaching the topic of bonding, basing chemical explanation on physical forces
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FeatureFour Curie centennial elements
The four Curie elements provide us with an interesting tour of the bottom of the periodic table
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ReviewChemistry3: introducing inorganic and physical chemistry
Andrew Burrows, John Holman, Andrew Parsons, Gwen Pilling and Gareth Price
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FeatureIda Noddack and the missing elements
Distinguished women chemists were rare in the early 20th century, but their contributions to chemistry are of great significance. Ida Noddack's scientific career centred around her intensive study of the Periodic Table, and resulted in her discovery, with husband Walter Noddack and physicist Otto Berg, of the metal rhenium, and of nuclear fission in the search for element 93.
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Lesson planAtoms and atomic structure: a ‘similar and different’ activity | 16-18 years
Help students consolidate their ideas about atoms and atomic structure, working in pairs to identify key concepts, using this lesson plan for 16–18 year olds.