Match the following columns. Column I Column II (i) Law of triads (a) Give the relationship of atomic masses and physical, chemical properties, (ii) Law of octaves (b) Periodic law (iii) Mendeleev (c)1866 (d) 1817

(i) - d Law of triads was discovered by doberenier in 1817. (ii) - c Law of octave was discovered by newland which was based on music notes in 1866. (iii) - a,b Mendleeve periodic table was based on physical and chemical properties of an elements arranged according to their atomic masses. Mendleeve was the scientist who discovered periodic law. Column I Column II (i) Law of triads (d) 1817 (ii) Law of octaves (c) 1866 (iii) Mendeleev (b) Periodic law, (a) Give the relationship of atomic masses and physical, chemical properties,

Match the following columns Column I (Group) Column II (Block) (i) 1 and 2 (a) p-block (ii) 3 to 13 (b) d-block (iii) 13 to 18 (c) s-block

(i) - c s- block consist of 1st and 2nd group which are known as alkali metals and alkaline earth metals group. (ii) - d d-block elements are known as transition elements and they are from 3 to 12 groups. (iii) - a 13 to 18 group elements are all p-block elements in which nitrogen, oxygen, halogen and inert families are present. Column I (Group) Column II (Block) (i) 1and 2 (c) s-block (ii) 3 to 13 (b) d-block (iii) 13 to 18 (a) p-block

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All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 16

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Two elements M and N belong to group $2$ and $3$ , respectively in the same period. The formulae of their oxides are

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Important Questions on The Periodic Table

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All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 17

Which one among the following is an alkaline earth metal ?

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All In One ICSE Chemistry>Chapter 5 - The Periodic Table>EXAM PRACTICE>Q 18

Match the following columns.

Column I	Column II
(i) Law of triads	(a) Give the relationship of atomic masses and physical, chemical properties,
(ii) Law of octaves	(b) Periodic law
(iii) Mendeleev	(c)1866
	(d) 1817