Properties of the elements are given below. Where would you locate the following elements in the periodic table?
(a) A soft metal stored under kerosene.
(b) An element with variable (more than one) valency stored underwater.
(c) An element which is tetravalent and forms the basis of organic chemistry.
(d) An element which is an inert gas with atomic number 2.
(e) An element whose thin oxide layer is used to make other elements corrosion-resistant by the process of “ anodising”.

AcademicChemistryNCERTClass 10

PropertiesElementsLocation
(a) A soft metal stored under kerosene
Sodium (Na) 
group 1 and Period 3 or Potassium (K) Group I and Period 4
(b) An element with variable (more than one) valency stored underwater.
Phosphorus (P)
Group 15 and Period 3
(c) An element which is tetravalent and forms the basis of organic chemistry.
Carbon (C)
Group 14 and Period 2

(d) An element which is an inert gas with atomic number 2.

Helium (He)
Group 18 and period 1
(e) An element whose thin oxide layer is used to make other elements corrosion-resistant by the process of “ anodising”.
Aluminium (Al) 
Group 13 and Period 3
raja
Updated on 10-Oct-2022 13:28:24

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