Question

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Answer 1

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Q.Find the atomic no,mass,no of electron,no of proton, Electronic configuration, valency,Valence electron. ?

1.Aluminium

Al-aluminum (symbol)

Aluminium atomic number = 13

Nos of electron in aluminium = 13

Nos of proton in aluminium =13

Atomic mass of aluminium =26

valency of aluminium = 3

Electronic configuration of aluminium =2,8,3

Valence electron of aluminium = 3

Note:-Aluminium is metal

2.sulphur

Sulphur -s (symbol)

Sulphur atomic number = 16

Nos of electron in sulphur = 16

Nos of proton in sulphur =16

Atomic mass of sulphur = 32

valency of sulphur = 2

Electronic configuration of sulphur =2,8,6

Valence electron of sulphur = 6

Note:-sulphur is non -metal

3.Argon

Argon-Ar (symbol)

Argon atomic number = 18

Nos of electron in Argon = 18

Nos of proton in Argon =18

Atomic mass of Argon =36

valency of Argon = 0

Electronic configuration of Argon =2,8,8

Valence electron of Argon = 8

Note:-Argon is Nobel gas

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Answer 2

Solutions :-

Q: Find the atomic number, mass number, number of electron, no of proton, electronic configuration and valency of the following elements.
1) Al
2) S
3) Ar

1)
Elements = Al (aluminum)
atomic number = 13
mass number = 13
number of electron = 13
number of proton = 26
electronic configuration = 2,8,3
valency = 3

2)
Elements = S (sulphur)
atomic number = 16
mass number = 16
number of electron = 16
number of proton = 32
electronic configuration = 2,8,6
valency = 2

3)
Elements = Ar (Argon)
atomic number = 18
mass number = 18
number of electron = 18
number of proton = 36
electronic configuration = 2,8,8
valency = 0