.…are good conductors of heat and electricity.
a) metals
b) non metals
c) metalloids
d) all of these
Metals are ……………
a) lustrous
b) sonorous
c) ductile
d) all of these
Hydrogen bond is…………times weaker than covalent bond.
a) twenty
b) fifteen
c) ten
d) five
Exercise:
An atom with a charge is called:
a) an electron
b) a molecule
c) a metal
d) an ion
An element X is in group VI of the periodic table. The ion will be represented by:
a) X+
b) X-
c) X-2
d) X+2
