Classification of Elements and Periodicity in Properties questions
826 published questions with worked solutions.
- Total number of ions from the following with noble gas configuration is ____. Sr²⁺ (z = 38), Cs⁺ (z = 55), La²⁺ (z = 57), Pb²⁺ (z...
- Given below are two statements : Statement (I) : The 4f and 5f - series of elements are placed separately in the Periodic table...
- The element having the highest first ionization enthalpy is
- Given below are two statements : Statement I : Fluorine has most negative electron gain enthalpy in its group. Statement II :...
- Given below are two statements : one is labelled as Assertion A and the other is labelled as Reason R Assertion A : The first...
- Given below are two statements: Statement-I : Along the period, the chemical reactivity of the elements gradually increases from...
- Match List-I with List-II. List-I (Species): (A) Cr²⁺, (B) Mn⁺, (C) Ni²⁺, (D) V⁺ List-II (Electronic distribution): (I) 3d⁸, (II)...
- Given below are two statements : one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A) : There...
- If IUPAC name of an element is "Unununnium" then the element belongs to nᵗʰ group of Periodic table. The value of n is ________.
- Consider the following elements arranged in the periodic table with the group going down and the period across: A′ B′ in the...
- The correct sequence of electron gain enthalpy of the elements listed below is A. Ar B. Br C. F D. S Choose the most appropriate...
- The ionization energy of sodium in kJ mol⁻¹, if electromagnetic radiation of wavelength 242 nm is just sufficient to ionize...
- Identify the element for which electronic configuration in +3 oxidation state is [Ar]3d^5:
- Identify the elements X and Y using the ionisation energy values given below : Ionization energy (kJ/mol): 1st, 2nd X: 495, 4563...
- The characteristics of elements X, Y and Z with atomic numbers, respectively, 33, 53 and 83 are :
- The absolute value of the electron gain enthalpy of halogens satisfies :
- The first ionization energy of magnesium is smaller as compared to that of elements X and Y, but higher than that of Z. the...
- The ionic radius of Na^+ ions is 1.02 Å. The ionic radii (in Å) of Mg^ 2+ and Al^ 3+ , respectively, are-
- Which one of the following statements for D.I. Mendeleeff, is incorrect?
- Consider the elements Mg, Al, S, P and Si, the correct increasing order of their first ionization enthalpy is :
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