The atomic numbers of three elements A, 8 and C are 11, 17 and 19 respectively. State giving reason which out of two elements will show similar chemical properties.(All India - 2013)
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The elements A(atomic number = 11) and C (atomic number = 19) will show similar properties.
The elements A and C lie in the first group of the periodic table and both the elements have valency equal to 1 . Due to this A and C show similar properties.
A and C will both loose one valence electron to attain their nearest noble gas configuration.
Element B lies in the group 17 of the periodic table . It is a halogen and has properties different from A and C.
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