Non-metallic properties tend to …….. across each period.
a) increase
b) decrease
c) remains same
d) none of these
Representative elements are …….
a) s-block
b) p-block
c) a & b both
d) all of these
Those elements which show variable valency are called ……….
a) representative elements
b) transition elements
c) actinides
d) lanthanides
Transition elements (also known as transition metals) are elements that have partially filled d orbitals.
Lanthanides elements are also called ……
a) rare earth metals
b) alkali metals
c) alkaline earth metals
d) all of these
The lanthanides series contains…… elements.
a) 14
b) 18
c) 16
d) 12
Lanthanides series ranges from Cerium to..…
a) Barium
b) Thorium
c) Lawrencium
d) Lutetium
