in older periodic tables, group numbers 1-7 and 0 are given for the main groups in newer periodic tables, ‘IUPAC’ group numbers 1-18 are given for all the groups Hydrogen, H, is placed above the top ...
The high relative abundance of these tellurium isotopes gives tellurium the greater relative atomic mass. The atomic number of tellurium is 52 and the atomic number of iodine is 53, so these elements ...
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