1.
On moving left to right in the periodic table, the size of the atom
2.
Which of the following are the characteristics of isotopes of an element? (i) Isotopes of an element have same atomic mass (ii) Isotopes of an element have same atomic number (iii) Isotopes of an element show same physical properties (iv) Isotopes of an element show same chemical properties
3.
Which of the following set of elements is written in order of their increasing metallic character?
4.
Up to which element, the Law of Octaves was found to be applicable
5.
Which of the following statements about the modern periodic table is correct?
6.
An element which is an essential constituent of all organic compounds belongs to
7.
Which of the following is the outermost shell for elements of period 2?
8.
Which of the following is not a correct statement about the trends when going from left to right across the period of periodic table?
9.
Which among the following elements has the largest atomic radii?
10.
Which of the following elements does not lose an electron easily?
11.
Which one of the following elements exhibit maximum number of valence electrons?
12.
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.
13.
Which one of the following does not increase while moving down the group of periodic table?
14.
Where would you locate the element with electronic configuration 02, 8 in the Modern Periodic Table?
15.
The element X forms a chloride with formula XC12 which is a solid with high melting point. X would most likely be in the same group of periodic table as
16.
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?
17.
Which of the following elements will form an acidic oxide?
18.
The elements with atomic number 14 are hard and forms acidic oxide and a covalent halide. To which of the following does the element belong?
19.
Three elements B, Si and Ge are
20.
According to Mendeleev's Periodic Law, the elements were arranged in the periodic table in the order of
