WebDownload PDF. Class 12 Classification of Elements and Periodicity in Properties MCQs. 1. The vertical columns in the periodic table are termed as ———-. (a) periods (b) groups (c) series (d) none of these. Ans: (b) Ans: The vertical columns in the periodic table are termed as groups. 2. The element with atomic number 26 will be found in ... WebOct 21, 2024 · Periodic table : Arrangement of elements in the increasing order of atomic number such that elements with similar properties fall under same vertical column. Group : A vertical column of elements in the periodic table. Period : A horizontal row of elements in the periodic table. Long form of periodic table has 18 groups and 7 periods.
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WebAnswer: (i) n = 3. Thus element belong to 3rd period, p-block element. Since the valence shell contains = 6 electrons, group No = 10 + 6 = 16 configuration =1s 2 2s 2 2p 6 3s 2 … WebClass 11 Chemistry Chapter 3 explores the key concepts of the origins of periodic classification, element nomenclatures with atomic numbers greater than 100, elements' … WebMar 29, 2024 · periodic table, in full periodic table of the elements, in chemistry, the organized array of all the chemical elements in order of increasing atomic number—i.e., the total number of protons in the atomic … san jose del monte savings and credit coop