Chemistry
Arrange the elements of second and third period in increasing order of their atomic size (excluding noble gases).
Periodic Table
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Answer
Second Period — F < O < N < C < B < Be < Li.
Third Period — Cl < S < P < Si < Al < Mg < Na.
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Related Questions
What do you understand by atomic size ? State its unit.
Give the trends in atomic size on moving :
(i) Down the group,
(ii) Across the period left to right.
Why is the size of (i) neon greater than fluorine ? (ii) sodium is greater than magnesium ?
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