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प्रश्न
Write down the electronic configuration of
(i) chlorine atom (ii) chlorine ion
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उत्तर
- Electronic configuration of chlorine = 2, 8, 7
- Electronic configuration of chlorine ion = 2, 8, 8
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संबंधित प्रश्न
Five atoms are labelled from A to E.
| Atoms | Mass No. | Atomic No. |
| A | 40 | 20 |
| B | 19 | 9 |
| C | 7 | 3 |
| D | 16 | 8 |
| E | 14 | 7 |
(a) Which one of these atoms:
(i) contains 7 protons,
(ii) has an electronic configuration 2, 7?
(b) Write down the formula of the compound formed between C and D.
(c) predict which are: (i) metals, (ii) non-metals?
Explain the following briefly:
Helium does not form He2 molecule
How many atoms of each kind are present in the following molecule:
Calcium oxide
State the following is a reduction reaction or oxidation reaction.
\[\ce{Fe^2+ - e- -> Fe^3+}\]
Choose the correct option
Which of the following is the correct electronic configuration of potassium?
Explain the following:
Carbon-12 and carbon-14 both show similar chemical properties.
Complete the table give below.
| Element |
Atomic number |
Electron distribution | Valence electrons | Lewis dot structure |
| Lithium | 3 | 1s22s1 | ||
| Boron | 5 | 1s22s22p1 | ||
| Oxygen | 8 | 1s22s22p4 |
Choose the odd one out and write the reason:
| Name of compound | Type of compound | |
| a. | Sodium chloride | ______ |
| b. | ______ | co-ordinate covalent compound |
| c. | Methane | ______ |
| d. | Fluorine molecule | ______ |
How many electrons are required or released by each atom in water molecule to attain the nearest noble gas configuration?
