1)The correct order of elements having second ionization energies of 1757, 5247, 2423 and 7293 kJ mor,
respectively, is
(A) Be, Li, He, B
(B) Be, Li, B. He
(C) Be, He, B, Li (D) B, He, Li, Be
2)The correct order of elements having second ionization energies of 14841, 4615, 3657 and 11807 kJ mor?
respectively, are
(A) C, N, F, O
(B) O, C, N, F
(C) C, O, N, F
(D) O, N, C, F
Answers
1. C)
2. A)
Explanation:
1) because of electronic configuration....stable electronic configuration during removing of 2 electron
2) same reason as above
Answer:
The correct order of elements having second ionization energies of 1757, 5247, 2423, and 7293 kJ/mol is Be, He, B, and Li respectively.
The correct order of elements has second ionization energies of 14841, 4615, 3657, and 11807 kJ/mol are O, N, C, and F respectively.
Explanation:
Ionization energy can be defined as a measure of the capability of an element to enter into chemical reactions requiring ion formation or donation of electrons.
(1) Be, Li, He, B
Lithium is having higher second ionization energy as now, the removal of electrons is from the stable configuration. Helium is having ionization less than Lithium and In B removal of the second electron is easier than Be.
Order of the ionisation energy: Be < B < He < Li
Hence, the correct option is (C) Be, He, B, Li.
(2) C, N, F, O
Oxygen is having higher second ionization energy as now, the removal of electrons is from the stable configuration. Fluorine is having ionization less than Nitrogen and In N removal of the second electron is easier than in C.
Order of the ionisation energy: C < N < F < O
Hence, the correct option is (D) O, N, C, F.
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