View PDF CBSE Class 9 Science Structure of Atom MCQs Set A

STRUCTURE OF ATOM   1. The electronic configuration of the element with atomic number 19 is (A) 2,8,7 (B) 2,9,8 (C) 2,8,8,1 (D) 2,10,7   2. The valence electrons of an element are reponsible for (A) Physical properties of an element (B) Chemical properties of an element (C) Both the properties (D) None of these   3. An element has electronic configuration 2,8,4 it will be classified as (A) Metal (B) Non metal (C) Metalloid (D) None of these   4. Isotopes of an element do not have (A) Same number of element (B) Same physical properties (C) Same chemical properties (D) Same elecrical charge on

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