Question 4 :
18.................elements are present on the right side of the periodic table

Question 6 :
Which of the following statement(s) about the modern periodic table are incorrect?<br>IThe elements in the modern periodic table are arranged on the basis of their decreasing atomic number.<br>IIThe elements in the modern periodic table are arranged on the basis of their increasing atomic masses.<br>IIIIsotopes are placed in adjoining group (s) in the periodic table.<br>IVThe elements in the modern periodic table are arranged on the basis of their increasing atomic number.

Question 9 :
Which of the following is the correct set of elements to Dobereiner's triads?