Question

An atom has electronic configuration 2 8 7 what is the atomic number of this element and name the element? to which of the elements would be chemically similar N7, F9,P15, Ar18​

Answer 1

Answer:

The atomic number of an element is nothing but the total number of electrons present in it. -So, the number of electrons present in an atom = 2+8+7 = 17. -Therefore the atomic number of the element is equal to 17. -The element having atomic number 17 is Chlorine.The atomic number of an element is nothing but the total number of electrons present in it. -So, the number of electrons present in an atom = 2+8+7 = 17. -Therefore the atomic number of the element is equal to 17. -The element having atomic number 17 is Chlorine.

Explanation:

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