The elements in modern periodic table are arranged in ____ order of their _______ number.
Question 4 Which of the following statement(s) about the Modern Periodic Table are incorrect?
(i) The elements in the Modern Periodic Table are arranged on the basis of their decreasing atomic number
(ii) The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic masses
(iii) Isotopes are placed in adjoining group (s) in the Periodic Table
(iv)The elements in the Modern Periodic Table are arranged on the basis of their increasing atomic number (a) (i) only (b) (i), (ii) and (iii) (c) (i), (ii) and (iv) (d) (iv) only
Which of the following statement is correct in regard to the classification of elements?
(a) Elements in the modern periodic table are arranged on the basis of increasing atomic numbers
(b) Elements in Mendeleev’s periodic table are arranged on the basis of increasing atomic numbers
(c) In the modern periodic table, the element nickel of lower atomic mass is kept before the element cobalt of higher atomic mass.
(d) In the modern periodic table, the isotopes of chlorine having different atomic masses are kept in the same group.
Question 46 (a) In this ladder (Figure 5.2) symbols of elements are jumbled up. Rearrange these symbols of elements in the increasing order of their atomic number in the Periodic Table.
(b) Arrange them in the order of their group also.
In the modern periodic table, the elements are arranged on the basis of their increasing atomic number.