Diagnostic and Remedial Teaching CTET MCQ
All the inert gases are placed in
1. Zero group
2. First group
3. Second group
4. Third group
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Based on the electronic configuration, the elements are classified into….. classes
1. Two
2. Three
3. Four
4. Five
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Concept of actaves was proposed by
1. Mosley
2. Mendeleef
3. Newlands
4. Pettenkofer
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Elements from atomic number 89 (Actinium) to 102 (Nobelium) are known as
1. Lanthanoids
2. Actinoids
3. Inertgases
4. Representative elements
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