Question

Electr
particle having
Proton is a positively ch
of a proton is almost equal to
Neutron is an electrically neutral partic
The atom consists of a positively charged core
consists of protons and neutrons and is surrounded by ele
around the nucleus in certain fixed orbits (or shells).
In
an
atom
,
the
number
of
electrons
is
equal
to
the
number
of
The atomic number (2) of an element is equal to the number
of its atom.
The mass number (A) of an atom is equal to the sum of
neutrons present inside the nucleus.
Isotopes are the atoms of the same element possess
the same atomic number.
The average mass of an atom of an element in ato
mass.
FORMATION OF IONS
An atom is electrically neutral be
of electrons and protons.
Whenever an atom loses or g
electrically charged.
The electrically charged
atom loses or gains electro
Whenever an atom lose
ion is formed.
The positively charg
For example, when a
sodium ion (Na).
los
Na
sodium atom
12 M
11 P
sodium atom
(Na)
11 electro
+
11 pro​

Answer 1

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