Teaching Jharkhand (JSSC) PRT (1 to 5) Mock Test 2023 General Science Chemistry Classification of Elements and Periodicity in Properties

ନିମ୍ନଲିଖିତ କେଉଁ ଉପାଦାନର ପରମାଣୁ ସଂଖ୍ୟା 12 ଅଟେ ?

1
ସଲଫର
2
କ୍ଳୋରିନ 
3
ମ୍ୟାଗ୍ନେସିୟମ 
4
ସୋଡିୟମ
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