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प्रश्न
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is chemically inert.
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उत्तर
Electronic configuration of element A = (2, 8) at atomic no. 10
∴ Element C having 8 electrons in outer most orbit is chemically inert.
संबंधित प्रश्न
Elements X, Y, and Z have atomic numbers 6, 9 and 12 respectively. Which one forms an anion?
State the type of bonding in the following molecule.
Calcium oxide
Name an element which does not contain neutron.
What do you understand by redox reactions?
Potassium (at No.19) and chlorine (at No.17) react to form a compound. Explain the formation of the compound on the basis of reducing agent.
Give the orbital diagram of the following:
Nitrogen
Copy and complete the following table relating to the atomic structure of some elements:
| Element | Atomic Number | Mass Number | Number of protons | Number of Neutrons | Number of Electrons |
| Beryllium | 4 | 9 | |||
| Fluorine | 9 | 10 | |||
| Sodium | 12 | 11 | |||
| Aluminium | 27 | 13 | |||
| Phosphorus | 31 | 15 |
Number of valence electrons in carbon is ______.
Draw the electron distribution diagram for the formation of Carbon di oxide (CO2 ) molecule.
How many atoms of each kind are present in the following molecule:
water
