Chemistry
Why is the size of (i) neon greater than fluorine ? (ii) sodium is greater than magnesium ?
Periodic Table
122 Likes
Answer
(i) The size of neon is bigger compared to fluorine because the outer shell of neon have a complete octet. They have maximum number of electrons in their outermost orbit thus the electronic repulsions are maximum. So, the effect of nuclear pull over the valence shell electrons is not observed. Hence, the size of neon is greater then fluorine.
(ii) Magnesium is placed to the right of Sodium in period 3. As the atomic size decreases on moving from left to right across the period, hence, atomic size of Sodium is greater than Magnesium.
Answered By
82 Likes
Related Questions
Give the trends in atomic size on moving :
(i) Down the group,
(ii) Across the period left to right.
Arrange the elements of second and third period in increasing order of their atomic size (excluding noble gases).
Which is greater in size ?
(a) An atom or a cation
(b) An atom or an anion
(c) Fe2+ or Fe3+
(d) Fluorine or oxygen
Which has maximum metallic character Na, Li or K.