Related Questions
An element with atomic number of 50 belongs to
s – block
p – block
d – block
f – block
Which period of the periodic table contains elements with electrons filling the 4d subshell?
4th period
5th period
6th period
7th period
An element X belongs to group 14 and period 3 of the periodic table. What is the number of valence electrons in X?
2
4
6
8
Elements of group 1 and group VI in the periodic table have one thing common. That is with the increasing atomic number, the:
Maximum valency increases
Reactivity increases
Atomic radius increases
Oxidizing power increases
Oxygen is divalent, but sulphur exhibits variable valency of , because:
Sulphur is less electronegative than oxygen
Sulphur is bigger atom than oxygen
Ionisation potential of sulphur is more than oxygen
Of the presence of -orbitals in sulphur
Mendeleef’s Periodic Table is upset by the fact that
Arranging elements solely by increasing atomic weight leads to some elements being out of order in terms of their properties.
The discovery of noble gases completely disrupted the order of the periodic table.
Elements with similar atomic weights always have similar properties.
Mendeleev did not account for the existence of isotopes.
Which one pair of atoms or ions will have same configuration?
Which of the following elements is expected to have the largest atomic radius?
K
Ca
Ga
Ge
An element has the electronic configuration . In which period and group is this element located?
Period 2, Group 17
Period 3, Group 15
Period 3, Group 17
Period 4, Group 17
An element 'X' in the third period exhibits a sharp increase in its third ionization enthalpy. Element 'X' forms an amphoteric oxide and reacts with both acids and bases. Identify 'X'.
Mg
Si
P
Al
