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19/11/2020 11:53 am
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Out of the three elements P, Q and R having atomic numbers 11, 17 and 19 respectively, which two elements will show similar properties and why?
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19/11/2020 11:54 am
P(11): 2,8,1
R(19): 2, 8, 8, 1
Q(17): 2, 8, 7
Elements P, R will show similar properties as they belong to they same group with valency 1 due to same number of valance electrons.