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प्रश्न
Identify the following reaction as either oxidation or reduction:
Fe3+ + e- → Fe2+
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उत्तर
Reduction
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संबंधित प्रश्न
State differences between the properties of ionic compounds and covalent compounds.
The following table shows the electronic configuration of the elements W, X, Y, Z:
|
Element |
W |
X |
Y |
Z |
|
Electronic |
2, 8, 1 |
2, 8, 7 |
2, 5 |
1 |
Answer the following question based on the table above:
What is the formula of the compound formed between W and X.
How many atoms of each kind are present in the following molecule:
Calcium oxide
Give a reason
Physical properties of isotopes are different.
Complete the following table relating to the atomic structure of some elements.
|
Element Symbol |
Atomic Number |
Mass Number |
Numbers of neutrons |
Number of Electrons |
Number of Protons |
|
Li |
3 |
6 |
|
|
|
|
Cl |
17 |
|
20 |
|
|
|
Na |
|
|
12 |
|
11 |
|
Al |
|
27 |
|
|
13 |
|
S |
|
32 |
16 |
|
|
Complete the table give below.
| Element |
Atomic number |
Electron distribution | Valence electrons | Lewis dot structure |
| Lithium | 3 | 1s22s1 | ||
| Boron | 5 | 1s22s22p1 | ||
| Oxygen | 8 | 1s22s22p4 |
Spot the error/correct the wrong statement:
In the formation of compounds, the inner shell electrons of an atom involved in bonding.
How many atoms of each kind are present in the following molecule:
water
How many electrons are required or released by each atom in carbon tetrachloride to attain the nearest noble gas configuration?
Elements A, B and C have atomic number 17, 19 and 10 respectively.
State which one is chemically inert.
