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प्रश्न
Name three non-metals/radicals which have valency -1, -2, and -3.
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उत्तर
-1 = Chlorine, Bromine, Iodine.
-2 = Oxide, Sulphide, Sulphate.
-3 = Nitrogen, Nitride Phosphate.
APPEARS IN
संबंधित प्रश्न
MATCH THE COLUMNAS
| 1. Jpham Dalton | a. Neutrons |
| 2. Atom | b. Model of the atom |
| 3. Chadwick | c.The atomic theory of matter |
| 4. Rutherfrod | d. Positively charged |
| 5. Protons | e. Electricity neutral |
| 6. Nuclear fusion | f. Generator of electricity |
| 7.Gamma -rays | g. High penetrating power |
| h.Energy in sun |
ANSWER IN DETAIL
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Define: An Atom:
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What is such a particle called ?
How many times is a proton heavier than an electron?
What value has been given to the mass of this reference atom ?
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
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Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
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Define the following term with an example.
Element
Name the sub-atomic particles.
Define the following term with an example.
Compound
Define the following term with an example.
Metal
Define the term ions or radicals.
