Question

22. Select the correct statements below. L. An atom of chlorine is larger than sulfur because the addition of an electron increases the repulsions without an increase in attraction for the nucleus resulting in less screening. An atom of oxygen is smaller than an atom of carbon because the distance of the valence electrons remains the same while the attraction for the nucleus increases with increasing number of protons. III. An atom of potassium is smaller than an atom of rubidium because both effective clear charge increases down a group and the principal quantum number of the valence orbitals increases An atom of sodium is smaller than increases down a group and the principal quantum number of nuclear charge increases down a grou valence orbitals increases smaller than an atom of bromine because the princin An atom of chlorine is smaller tha entum number of the valence orbitals increases tom of silicon is smaller than an atom of each tum number of the valence orbitals increase Lom of carbon because the principal II, IV, V only 1. III, VI only b) d) II. V only III. IV. VI only

Answer 1

Atomic size increases on moving down the group from top to bottom as the number of shells increases.

Atomic size decreases on moving from left to right across a period as the number of electrons in the same shell
22. Anato Select the correct statements below. An atom of chlorine is larger than sulfur because the addition of an electron increases the repulsions without an increase in attraction for the nucleus resulting in less screening. An atom of oxygen is smaller than an atom of carbon because the distance of the valence electrons remains the same while the attraction for the nucleus increases with increasing number of protons. An atom of potassium is smaller than an atom of rubidium because both effective uclear charge increases down a group and the principal quantum number of the valence orbitals increases sodium is smaller than an atom of magnesium because both effective increases down a group and the principal quantum number of III. ne is smaller than an atom of bromine because the princin An atom of sodium is smaller than nuclear charge increases down a grou valence orbitals increases An atom of chlorine is smaller untum number of the valence orbitals increases An atom of silicon is smaller th tum number of the valence orbitals increase II, IV, V only 1. III, VI only ller than an atom of carbon because the principal II. V only 1 III IV VI only

21. An element with the electron configuration (Xe) 65'4/5d would belong to which class on the periodic table? a) rare earth elements b) alkaline earth elements halogens transition elements
increases, effective nuclear charge increases.