Rank elements: Na, Mg, Al, and K, in increasing order of: (i) atomic size; (ii) ionization energy, and (iii) reactivity. (b) Explain why atomic size decreases from left to right, but increases from top to bottom; (c) Explain why ionization energy increases from left to right, but decreases from top to bottom; (d) Explain why the reactivity of alkali metals (Group-1) increases from top to bottom, where as the reactivity of halogen (Group-17) decreases from top to bottom.
Rank elements: Na, Mg, Al, and K, in increasing order of: (i) atomic size; (ii) ionization energy, and (iii) reactivity. (b) Explain why atomic size decreases from left to right, but increases from top to bottom; (c) Explain why ionization energy increases from left to right, but decreases from top to bottom; (d) Explain why the reactivity of alkali metals (Group-1) increases from top to bottom, where as the reactivity of halogen (Group-17) decreases from top to bottom.
Chapter7: Atomic Structure And Periodicity
Section: Chapter Questions
Problem 9RQ
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(a) Rank elements: Na, Mg, Al, and K, in increasing order of: (i) atomic size; (ii) ionization energy, and
(iii) reactivity.
(b) Explain why atomic size decreases from left to right, but increases from top to bottom;
(c) Explain why ionization energy increases from left to right, but decreases from top to bottom;
(d) Explain why the reactivity of alkali metals (Group-1) increases from top to bottom, where as the
reactivity of halogen (Group-17) decreases from top to bottom.
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