railway RRB Group D Mock Test Series 2024-25 General Science Chemistry Classification of Elements and Periodicity in Properties

ନିମ୍ନଲିଖିତ ଉପାଦାନ ମଧ୍ୟରୁ କେଉଁଟିର ପରମାଣୁ ସଂଖ୍ୟା 87 ଅଛି?

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ଫ୍ରାନ୍ସିୟମ୍
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ସେସିୟମ୍  
3
ଲିଥିୟମ୍
4
ରୁବିଡିୟମ୍  
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