1. ആവർത്തനപ്പട്ടികയിലുള്ള പ്രകൃത്യാലുള്ള മൂലകങ്ങളുടെ എണ്ണം? [Aavartthanappattikayilulla prakruthyaalulla moolakangalude ennam? ]
Answer: 90
Reply
Comments
- By: remshad on 06 Jun 2018 12.40 amIt used to be believed that of the first 92 elements on the periodic table (1 is hydrogen and 92 is uranium) that 90 elements occur naturally. Technetium (atomic number 43) and promethium (atomic number 61) were synthesized by man before they were identified in nature
Show Similar Question And Answers