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Chemistry CBSE Live product
Class 9 (2025-26)
Structure of the atom
Atomic number, mass number, and isotopes, isobars, and isotones
2.
Calculation of atomic mass
Question:
2
m.
Solve the
problem
given below
:
Sulphur
has
16
protons and
16
neutrons.
Calculate
the
atomic mass
.
Electron distribution in
Sulphur
Mass number =
Number of neutrons + Number of electrons
Number of positrons + Number of electrons
Number of protons + Number of neutrons
Number of protons + Number of electrons
Mass number of
Sulphur
is
1
3
32
2
.
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