Matach the following

Dear student,

Eugen Goldstein was credited with the discovery of protons. He is also the discoverer of the anode rays. 
Self linking property of carbon is known as catenation.
Elements combine with their own atoms in a fixed number is called its atomicity. 
The number of electrons in the K shell is 2.
The valency of cuprous ion (Cu+) is 1. 

Hence the correct matches are-
1- (e)
2- (d)
3- (a)
4- (b)
5- (c)

Regards

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