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प्रश्न
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is a non-metal.
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उत्तर
Electronic configuration of element A = (2, 8, 7) at atomic no. 17
∴ Element A has 7 electrons in its outermost shell it is a non-metal.
संबंधित प्रश्न
Match the column A with Column B.
|
Column A |
Column B |
|
(i) Sodium chloride (ii) Ammonium ion (iii) Carbon tetrachloride |
Covalent bond Ionic bond Covalent and coordinate bond |
How many atoms of each kind are present in the following molecules: calcium oxide, chlorine, water, carbon tetrachloride?
How many electrons are required by each atom mentioned in (a) to attain the nearest noble gas configuration?
State the following is a reduction reaction or oxidation reaction.
\[\ce{Fe^2+ - e- -> Fe^3+}\]
State the type of bonding in the following molecules.
Calcium oxide
Explain the following:
Carbon-12 and carbon-14 both show similar chemical properties.
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 |
Draw the geometric atomic structure of the three isotopes of hydrogen and the two isotopes of chlorine.
Draw the geometric atomic structure of the following atom showing the number of electrons, protons and neutrons in them:
\[\ce{^31_15P}\]
Explain Octet rule with an example.
Choose the odd one out and write the reason:
