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InterviewSolution
| 1. |
The element cited as an example to prove the validity of Mandeleef’s periodic law is : (a) scandium (b) germanium (c) gallium (d) all of these |
| Answer» <p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Correct option (d) all of these</strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000"><strong>Explanation:</strong></span></span></p><p style="text-align: justify;"><span style="font-family:Arial,Helvetica,sans-serif"><span style="color:#000000">The discovery of these elements were made later on, however Mandeleef left blank spaces in periodic table and predicted their propery.</span></span></p> | |