1.
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?
2.
Which one of the following does not increase while moving down the group of the periodic table?
3.
Which one of the following elements exhibit maximum number of valence electrons ?
4.
Three elements B, Si and Ge are:
5.
What type of oxide would Eka-aluminium form?
6.
Which of the following gives the correct increasing order of the atomic radii of O, F and N
7.
Which of the following is the outermost shell for elements of period 2
8.
Which of the following elements will form an acidic oxide?
9.
Arrange the following elements in the order of their increasing non-metallic character: Li, O, C, Be, F
10.
Which of the following elements does not lose an electron easily?
11.
Arrange the following elements in the order of their decreasing metallic character: Na,Si,Cl,Mg, Al
12.
Which of the following elements would lose an electron easily?
13.
Which of the following are the characteristics of isotopes of an element? (i) Isotopes of an elements have same atomic masses. (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.
14.
Which among the following elements has the largest atomic radii?
15.
Which one of the following depict the correct representation of atomic radius (r) of an atom?
