In modern periodic table, scientists arranged element on the basis of ………atomic number.
a) decreasing
b) increasing
c) multiple of atomic number
d) random
Which of the following subatomic particle/s of an atom define/s the identity of an element?
a) proton
b) neutron
c) electron
d) all of these
Mass Number:
The mass number is defined as the total number of protons and
neutrons in an atom. It can be calculated by adding the number of neutrons and
the number of protons (atomic number) together. It is represented by A.
Which of the
following subatomic particles together make mass number?
a) protons and neutrons
b) protons and electrons
c) neutrons and electrons
d) none of these
The mass number of an atom is represented by English letter………
a) A
b) N
c) P
d) Z
