This page covers AFCAT Classification of Elements & Periodicity with complete concept notes, 16 graded practice MCQs, key points and exam-specific tips. Free to study.
The element with the highest electronegativity value in the periodic table is:
Practice 2easy
Which period of the periodic table contains the first lanthanide series element?
Practice 3easy
Atomic radius generally increases down a group because:
Practice 4easy
Which element belongs to Group 17 (Halogens) and Period 3?
Practice 5easy
Which of the following elements is a transition metal with atomic number 26?
Practice 6medium
Ionization energy increases across a period and decreases down a group. Which of the following elements has the highest first ionization energy?
Practice 7medium
An element belongs to Group 17 and Period 3 of the periodic table. Identify this element and its electron configuration.
Practice 8medium
The element with atomic number 35 belongs to which block and group of the periodic table?
Practice 9medium
Which of the following statements correctly describes the periodic trend for atomic radius down a group?
Practice 10medium
Which pair of elements shows the expected trend in electronegativity according to periodic law?
Practice 11medium
Which of the following elements exhibits the highest electronegativity value on the Pauling scale?
Practice 12medium
The atomic radius generally decreases across a period in the periodic table. Which factor is primarily responsible for this trend?
Practice 13medium
Which element is a transition metal with atomic number 24 and exhibits multiple oxidation states?
Practice 14hard
The first ionization energy of nitrogen (7N) is higher than that of oxygen (8O), despite oxygen having a greater nuclear charge. Which of the following best explains this anomaly in periodicity?
Practice 15hard
The electronegativity values for F, Cl, Br, and I are 3.98, 3.16, 2.96, and 2.66 respectively. This trend in Group 17 demonstrates the periodicity principle that electronegativity decreases down a group. Which of the following is the primary reason for this decrease?
Practice 16hard
Among the elements Li, Be, B, and C in Period 2, the atomic radius decreases in the order Li > Be > B > C. If the atomic radius of Li is 152 pm and that of C is 77 pm, which statement correctly reflects the periodicity of atomic radius within this period?