I have seven valence electrons and I have two more protons than phosphorus who am I

Answer : The unknown element is, chlorine.

Explanation :

As we are given that there are seven valance electrons and two more protons than phosphorous.

As we know that, phosphorous is a non-metal which belongs to group 15.

The atomic number of phosphorous is, 15 that means there are 15 electrons in phosphorus atom.

The electronic configuration of phosphorus is:

As the unknown element has two more protons than phosphorus that is 15 + 2 = 17

The electronic configuration of will be:

The unknown element have seven valance electrons. Thus, the element will be chlorine.

Hence, the unknown element is, chlorine.

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