Question

The atomic number of x is 17 predict it's (1)valency​

Answer 1

Answer:

The atomic number is 17 . Element is chlorine

configuration is ( 2,8,7)

No.of valence electrons = 7

valency = 8 - 7 = 1

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Answer 2

Given:

Atomic Number of an element "X" = 17

we know that

Atomic number = No. of protons or No. of electrons.

so the no. of electrons are 17.

So let's start the distribution of the electrons in the shells or orbits.

• So In k shell = 2 electrons
• L shell = 8 electrons
• M shell = 7 electrons

So in the outermost shell it has 7 electrons but to get stability it should satisfy octect rule.

so the atom will try to gain one electron without losing 7 electrons.

so it has a valency of 1