Question
Thu January 17, 2013 By:
 

How does the modern periodic table provide provision for hydrogen's isotopes?

Expert Reply
Thu January 17, 2013
Hydrogen resembles both alkali metals (group I A) as well as halogens (group VII A) therefore its position is said to be anomalous.
Some of the properties of hydrogen are similar to those of the elements of certain groups, as discussed above, but this is a fact that hydrogen is a unique element whose properties do not match exactly with any of the groups in the Periodic Table. However due to partial resemblance in properties with alkali metals and monovalent nature, hydrogen is usually placed at the top of elements in group IA.
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