What isotope has 18 protons and 22 neutrons?

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Answer 1 · 2016-02-04T13:37:52

This a neutral atom of #Argon#.

Always remember that the number of protons represent the Atomic no. of that particular element.

In this case the number of protons is #18#,So,the atomic no. is also #18#.

And the element with atomic no. #18# is #Argon# with symbol #Ar#

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Now we need to find the mass number of #Argon# .
Because #Mass# #n##umber-At##omic# #n##umber##=##N##o# #of# #n##eutrons#

Mass number of Argon=#40#

No of Neutrons#=40-18=22#

A neutral atom of argon also has #22# Neutrons.

So,It is clear that this is not an isotope but a neutral atom of #Argon#