Option b
The elements were arranged in the periodic table in the order of ……..
a) increasing mass number
b) decreasing mass number
c) increasing atomic number
d) decreasing atomic number
What is the name of table showing the systematic arrangement of elements?
a) element table
b) atomic table
c) periodic table
d) all of these
Where the periodic table does is widely used?
a) chemistry
b) physics
c) economics
d) both a and b
Which of the following is an icon of chemistry?
a) element
b) atomic number
c) periodic table
d) all of these
Periods:
The horizontal rows are called periods. Periods
correspond to the relationship of orbitals, or likely areas in which electrons
will be found, inside the outermost shell of the atom. Successive periods down
the table correspond to atoms with a more electron-rich core of inner shells.
Which of the
following is on the right top corner in the periodic table?
a) Hydrogen
b) Helium
c) Lithium
d) Francium
I think Helium
by at 2024-07-21 07:58:11