Question 2 :
The elements with atomic numbers $9, 17, 35, 53, 85$ are all :
Question 3 :
An element belongs to the 3rd period and Group II of the periodic table.<br/>Name of the element is ________.
Question 6 :
Which of the following is the correct set of elements to Dobereiner's triads ?
Question 8 :
Which of the following set of elements is written in order of theirincreasing metallic character?<br>
Question 9 :
Arrange the following elements in the order of their decreasing metallic character.Na, Si, Cl, Mg, Al
Question 11 :
Which of the following group of elements does not have same valence shell electrons?
Question 12 :
In Mendeleev's periodic table, the elements were arranged in the increasing order of their atomic masses. However, cobalt with atomic mass of 58.93 amu was placed before nickel having an atomic mass of  58.69 amu. Reason for the same is that :
Question 16 :
The electronic configurations of the elements $X,\ Y,\ Z$ and $J$ are given. Which element has the highest metallic character?
Question 17 :
Metallic character goes on decreasing while going from left to right in a period.
Question 19 :
Identify electronic configurations of elements whose atomic radii are determined by taking half the internuclear distance between like atoms.
Question 20 :
Where would you locate the element with electronic configuration2, 8 in the Modern Periodic Table?<br>
Question 22 :
If scientist succeed in obtaining element with atomic number 114, which of the following well known element would you expect it to resemble?
Question 24 :
The properties that have increasing values with increase in atomic number for the elements of 1A are?<br/>I. Ionization energy (potential)<br/>II. Atomic radius<br/>III. Atomic mass