r him.
He revised the number of lanthanides to 32, stated the number of elements in the early periods, and, in 1897, proposed the importance of atomic number instead of atomic weight. Spending his entire career as professor of physics at Lund, he introduced  the idea of wave numbers, and his work on atomic emission spectra led to his generalization of Balmer's equation. FTP, identify this Swedish scientist, whose formula for frequencies of lines in the spectrum of hydrogen depends on the constant named afte  r him.
He revised the number of lanthanides to 32, stated the number of elements in the early periods, and, in 1897, proposed the importance of atomic number instead of atomic weight.
Johannes Rydberg