defence exam ITBP Constable (Animal Transport) Mock Test 2024 General Science Chemistry Classification of Elements and Periodicity in Properties

ಕೆಳಗಿನ ಯಾವ ಅಂಶಗಳು 2 ರ ವೇಲೆನ್ಸಿಯನ್ನು ಹೊಂದಿವೆ?

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ಮೆಗ್ನೀಸಿಯಮ್
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ಜಲಜನಕ
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ಲಿಥಿಯಂ
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ಕಾರ್ಬನ್
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