The atomic numbers of three elements A, B and C are 12, 18 and 20 respectively. State, giving reason, which two elements will show similar properties.(All India - 2014)
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Answer:
a and b
Explanation:
because their atomic number are not divisible by 5
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The elements A(atomic number = 12 ) and C (atomic number = 20) will show similar properties.
The elements A and C lie in the second group of the periodic table and both the elements have valency equal to 2. Due to this A and C show similar properties.
Element B lies in the group 18 of the periodic table . It is a noble gas and has properties different from A and C.
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