Notice: Any other investigatory venture, which requires about 10 intervals of work, may be picked Along with the acceptance on the teacher.
The chapters and subtopics stated down below are according to the hottest syllabus of Central Board of Secondary Training. The exhaustive material supplied for each of those subtopics will tutorial you thru Whatever you can assume to study in Class 12 Physics.
Lack of an electron from an atom leads to the development of a cation. A cation is scaled-down than its mother or father atom as it has fomer electrons though its nuclear cost remains a similar. As an example, The atomic radius of sodium (Na) is 186 pm and atomic radius of sodium ion (Na+) = 95 pm.
Query 11. What would you comprehend by isoelectronic species? Title a species that tvill be iso electronic with Every single of the subsequent atoms or ions.
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Note: The above mentioned practical can be performed in an experiential fashion rather then recording observations.
Response: Dobereiner arranged specified components with related Houses in groups of 3 in this kind of way which the atomic mass of the middle factor was almost the same as the normal atomic masses of the main and 3rd elements.
Because CBSE Class 12 Biology ICSE Class 11 Mathematics the anion is shaped by attaining a number of electron. Consequently, the atomic radius is much larger than the corresponding atom.
Response: Mendeleev used atomic fat as the basis of classification of aspects from the periodic desk. He did follow it and classify elements into groups and intervals.
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Issue 2. Clearly show by a chemical reaction with drinking water that Na20 can be a simple oxide and Cl207 is undoubtedly an acidic oxide.
Concern eight. While geometries of NH3 and H20 molecules are distorted tetrahedral, bond angle in water is below that of ammonia. Talk about.
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Question 21. In addition to tetrahedral geometry, One more achievable geometry for CH4 is square planar with the four H atoms at the comers from the sq. along with the C atom at its centre. Describe why CH4 is not sq. planar?