Question Text
Question 1 :
In Newland's classification, elements are arranged in an increasing order of their:
Question 2 :
The groups from $1^{st}$ to $7^{th}$ of Mendeleev's periodic table were divided into ______ subgroups.
Question 4 :
Mendeleev used a Sanskrit numeral before the names of the predicted elements. What was the term used for it?
Question 9 :
Which of the following sets of atomic masses do not correspond to Dobereiner's triad?<br/>
Question 10 :
The three elements A, B and C with similar properties have atomic masses X, Y and Z respectively. The mass of Y is approximately equal to the average mass of X and Z. Such an arrangement of elements called as :<br/>
Question 11 :
Assertion: According to Dobernier's, a group of three similar elements arranged in their increasing atomic weights so that atomic weight of middle is equal to the arithmetic mean of the other two elements.
Reason: Atomic weight is equal to one twelfth of mass of a carbon atom.
Question 14 :
The elements which have taken the place of Eka aluminium is :<br/>