Atomic number of a few elements are give below: 10, 20, 7, 14 (a) Identify the elements. (b) Identify the Group number of these elements in the Periodic Table. (c) Identify the Periods of these elements in the Periodic Table. (d) What would be the electronic configuration for each of these elements? (e) Determine the valency of these elements.
(a) The element are: Neon (Z = 10), Calcium (Z = 20), Nitrogen (Z = 7) and Silicon (Z = 14). (b) Group number: Neon (18), Calcium (2), Nitrogen (15), Silicon (14). (c) Periods: Neon (2), Calcium (4), Fluorine (2), Silicon (3). (d) Electronic Configuration: Neon (2, 8); Calcium (2, 8, 8, 2); Nitrogen (2, 5); Silicon (2, 8, 4). (e) Valency: Neon (zero); Calcium (2); Nitrogen (3); Silicon (4).
