History
In 1920, shortly after it had become possible to determine the sizes of atoms using X-ray crystallography, it was suggested that all atoms of the same element have the same radii. However, in 1923, when more crystal data had become available, it was found that the approximation of an atom as a sphere does not necessarily hold when comparing the same atom in different crystal structures.
Read more about this topic: Atomic Radius
Famous quotes containing the word history:
“The history of a soldier’s wound beguiles the pain of it.”
—Laurence Sterne (1713–1768)
“You that would judge me do not judge alone
This book or that, come to this hallowed place
Where my friends’ portraits hang and look thereon;
Ireland’s history in their lineaments trace;
Think where man’s glory most begins and ends
And say my glory was I had such friends.”
—William Butler Yeats (1865–1939)
“A man will not need to study history to find out what is best for his own culture.”
—Henry David Thoreau (1817–1862)