General Science Chemistry Classification of Elements and Periodicity in Properties

ନିମ୍ନଲିଖିତ ଉପାଦାନଗୁଡିକ ମଧ୍ୟରୁ କେଉଁଟି ଏକ ନୋବେଲ ଗ୍ୟାସ୍ ଏବଂ ଏହାର ପରମାଣୁ ସଂଖ୍ୟା 18 ଅଛି ?

1
ଆର୍ଗନ୍ 
2
ନିୟନ୍ 
3
ହିଲିୟମ୍
4
ଅମ୍ଳଜାନ 

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