(a) What could be the reason for not considering Zn, Cd and Hg as transitional elements. (b) Predict the first element and group no. for the following as per the periodic table: i. Identify the element with five electrons in the outer sub-shell. ii. Identify an element that would tend to lose two electrons. iii. Identify an element that would tend to gain two electrons

Free previous-year papers & practice for JEE, NEET and CBSE Boards.

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Electronic Configuration and Periodic Table, Trends in Valence and Oxidation States Across Periodic Table | PadhAiPro

Question

TextElectronic Configuration and Periodic TableTrends in Valence and Oxidation States Across Periodic Table

Using the Periodic Table, predict the formulas of compounds which might be formed by the following pairs of elements;

Are the oxidation state and covalency of Al in [AlCl(H2O)5]2+ same ?

On the basis of quantum numbers, justify that the sixth period of the periodic table should have 32 elements.

Write the atomic number of the element present in the third period and seventeenth group of the periodic table.

Why do elements in the same group have similar physical and chemical properties?

Assign the position of the element having outer electronic configuration