Environment & Ecology · Environment
निम्नलिखित में से किस तत्व का महासागर में निवास समय (residence time) सबसे लंबा होता है?
- 1लोहा (आयरन)
- 2सोडियम✓
- 3सीसा (लेड)
- 4कैल्शियम
सही उत्तर देखें
सोडियम
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