NTSE Level Test: Periodic Classification of Elements - Grade 9 MCQ

Silicon (14) belongs to class of

According to Mendeleev’s Periodic Law, the elements were arranged in the periodic table in the order of

Chlorine (17) belongs to which group and period

Which of the following statement(s) about Modern Periodic Table are incorrect ?
(i) The elements in the Modem Periodic Table are arranged on the basis of their decreasing atomic number.
(ii) The elements in the Modem 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.

Which of the following is most reactive

The concept of triads in the elements was given by

Which of the following is most reactive

Upto which element, the Law of Octaves was found to be applicable ?

Which of the following set of elements is written in order of their decreasing metallic character ?

The elements A, B, C, D and E have atomic number 9, 11, 17, 12 and 13 respectively. Which pair of elements belong to the same group ?

Which one of the following does not increase while moving down the group of the periodic table ?

Which of the following statements is not a correct statement about the trends when going from left to right across the periods of periodic table ?

The element with atomic number 14 is hard and forms acidic oxide and a covalent halide. To which of the following categories does the element belong?

Element X forms a chloride with formula XCl₂ which is a solid with a high melting point. X would most likely be in the same group of the Periodic Table as ​

Which of the following elements will form an acidic oxide ?

In Mendeleev’s Periodic Table, gaps were left for the elements to be discovered later. Which of the following elements found a place in the periodic table later ?

Which of the following elements does not lose an electron easily ?