The modern periodic table is based on ………
a) atomic mass
b) atomic number
c) a & b both
d) none of these
The physical and chemical properties of the elements are the periodic function of their...…
a) atomic number
b) molecular mass
c) formula mass
d) atomic mass
Periods:
The horizontal rows of the elements in the periodic table are called ………..
a) periods
b) groups
c) octaves
d) triads
Total number of rows in the periodic table are
a) seven
b) nine
c) eight
d) five
All the elements in the same period have ………number of electronic shells.
a) same
b) different
c) no shells
d) none of these
