Question Text
Question 1 :
Mendeleev arranged the elements in increasing order of their atomic masses and according to their physical properties.<br/>
Question 3 :
Whose name is not associated with the development of periodic Table
Question 4 :
How many elements were known when Mendeleev presented the periodic table?
Question 5 :
The placement of elements in the Newlands' table was compared to :
Question 6 :
An element 'X' with atomic number 114 has recently been discovered. Its IUPAC name is:
Question 7 :
Fill in the blanks <br>In long form, shortest period is ___________.
Question 9 :
The relationship between the electron affinity of a univalent cation such as Na$^+$ and the ionisation energy of the neutral atom is:
Question 11 :
The increasing order of the first ionisation enthalpies of the elements $B, P, S$ and $F$ is:
Question 13 :
Assertion: Atomic number of the element ununtrium is 113.
Reason: According to IUPAC systematic nomenclature, the numerical roots for 1,1 and 3 are un, un and tri respectively.
Question 14 :
Which is the correct order of increasing energy of the listed orbitals in the atom of titanium?<br>(At. no. $Z=22$)
Question 15 :
Among the elements Ca, Mg, P, Cl, the order of increasing atomic radii is :
Question 16 :
The element with atomic number $118$, if discovered will be placed in:
