The element cited as an example to prove the validity of Mandeleef’s

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» Correct option (d) all of these Explanation: The discovery of these elements were made later on, however Mandeleef left blank spaces in periodic table and predicted their propery.

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»

Correct option (d) all of these

Explanation:

The discovery of these elements were made later on, however Mandeleef left blank spaces in periodic table and predicted their propery.

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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

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