Halogens show …….. character.
a) electro negative
b) non-metallic
c) a & b both
d) metallic
The eight group is also called……….
a) alkali metals
b) nitrogen family
c) noble gases
d) halogens
Explanation:The noble gases make up a class of chemical elements with similar properties; under standard conditions, they are all odorless, colorless, mono atomic gases with very low chemical reactivity. The six naturally occurring noble gases are helium, neon, argon, krypton, xenon, and the radioactive radon.
Noble gases contains ………electrons in their valance shell except helium.
a) 3
b) 4
c) 5
d) 8
Noble gases are chemically ……..
a) inert
b) reactive
c) a& b both
d) none of these
….group elements are called s-block elements
a) I
b) II
c) III
d) a & b both
Explanation:The s-block elements of the Periodic Table are those in which the last electron enters the outermost s-orbital. As the s-orbital can accommodate only two electrons, two groups (1 & 2) belong to the s-block of the Periodic Table.
Group III to VIII elements are called ……… elements.
a) s-block
b) p-block
c) f- block elements
d) d-block elements
Explanation:Those elements in which last electron occupies p-orbitals and are placed together in groups 13, 14, 15, 16 and 17 (Except Helium) are called p-block elements.
Each group of p-block elements is recognized by its first element.
