Periodic Classification of Elements

#chemistryquestions #grade11

Is a potassium atom larger, smaller or the same size as a potassium ion? Explain.
Why does the atomic size increase in going down any family of the periodic table?
Why do metals form positive ions and non-metals form negative ions?
Which of the following pairs would have a larger size and why? (a) K or K⁺ (b) F or F^-
Why does the first ionization energy increase from left to right in a given period of the periodic table?
Why ionization energy of alkali metals decreases as the atomic number increases?
Why do the Oxide O^-- and Sulphide S^-- have negative charge?
What is the basis of the classification of elements in Mendeleev’s periodic table?
Why do atomic radii decrease across a period and increase in a group with the increase of atomic number?
Arrange the elements Na, Li and K in the increasing order of first ionization energy.
Why is the ionization energy of Lithium greater than Sodium?
Compare the size of F^- and Na⁺ with the atomic size of Neon.
Why the size of Cl^- ion is larger than Cl atom where as the size of K⁺ ion is smaller than that of K atom?
State Modern Periodic law.
Why ionization energy of oxygen is less than that of nitrogen?
What is the basic difference between Modern Periodic Table and Mendeleev’s Periodic Table?

TyroCity