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Byju's Answer

Standard IX

Chemistry

Atomic Number

Name of the e...

Question

Name of
the element
Symbol
of the element
Atomic
number
Mass
number
No. of
protons
No. of
electrons
No. of
neutrons
Electronic configuration
Helium 2 4 2 K=2

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Solution

Identify the chemical symbol of Helium:
The chemical symbol of Helium is $He$ .
Identify the number of electrons and protons:
Atomic number $=$ Number of electrons $=$ Number of protons
Thus,
Number of electrons $= 2$
Number of protons $= 2$
Thus, the table is as follows:
Name of
the element
Symbol
of the element
Atomic
number
Mass
number
No. of
protons
No. of
electrons
No. of
neutrons
Electronic configuration
Helium $He$ 2 4 2 2 2 K=2

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Name of the elementSymbolof the elementAtomic numberMassnumberNo. of protonsNo. of electronsNo. of neutronsElectronic configurationHelium 24 2K=2

Name of
the element
Symbol
of the element
Atomic
number
Mass
number
No. of
protons
No. of
electrons
No. of
neutrons
Electronic configuration
Helium 2 4 2 K=2