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Subjects
Science CBSE
Class 9
Structure of the atom
Discovery and structural models of atomic particles
7.
Atoms and subatomic particles
Exercise condition:
3
m.
1
.
An atom is electrically
negative
neutral
positive
both
.
2
.
Meson
Proton
Electron
Neutron
is a positively charged particle.
3
.
The atomic number of an atom is
number of mesons and neutrons
number of electrons and neutrons
number of neutrons and protons
number of protons and electrons
.
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