Check the alternative that is NOT correct (Justify true and false answers) A) Th

Question

Check the alternative that is NOT correct (Justify true and false answers)
A) The behavior of the atomic rays in the periodic table is due to two factors, principal quantum number n, and the effective nuclear charge, Zef.
B) As n increases, the distance from the outermost electron to the nucleus increases,
Consequently, the atomic radius increases. Over a period in the periodic table, the
Number of more internal electrons remains constant.
C) In periods n is constant and Zef increases. Consequently, the attraction between the
Nucleus and the outermost electrons. This attraction causes the atomic radius to decrease and increase the ionization energy.
D) The cations are larger than the atoms that give rise to them and the anions are smaller than
Than the atoms that give rise to it.
E) Usually the ionization energy increases over time, with the exception of the removal of the first electron p and the removal of the fourth electron p.

Explanation / Answer

(A) TRUE , Accroding mosley law, the frequency of photon emitted is directly proportional to Zeffect.

(B) TRUE - In period the last electron of each atom will enter into same orbit. Hence no.of inner electrons remains constant.

(C) TRUE - From left to right in a period since the last electron enters into same orbit the effective nuclear charge increases and thus the atomic radius decreases.

(D) FALSE - In general the size of cations is smaller than its nutral atom but the size of anion is larger than the nutral atom. Because in cation less number of electrons are ther but in anion more number of electrons are there. But all of them have same number of protons.

(E) TRUE - p1 and p4 electrons have lower ionisation energy as the atoms becomes more stability after losing them (half filled or fulled electronic configuration)

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