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प्रश्न
Element X is a metal with a valency 2. Element Y is a non metal with a valency 3.
(a) Write equations to show how X and Y form ions.
(b) If Y is a diatomic gas, write the equation for the direct combination of X and Y to form a compound.
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उत्तर
(a) For element X :
X → X2 + 2e-
For element Y :
Y + 3e- → Y3-
(b) Since Y is a diatomic gas hence it combines with X as :
3X + Y2 → X3Y2
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संबंधित प्रश्न
State differences between the properties of ionic compounds and covalent compounds.
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.
\[\ce{Cu -> Cu^2+}\]
Five atoms are labeled 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 electronic configuration 2,7
(b) Write down the formula in the compound formed between C and D
(c) Predict : (i) metals (ii) non-metals
What do you understand by redox reactions?
State the type of bonding in the following molecules.
Water,
Identify the following reaction as either oxidation or reduction:
Fe3+ + e- → Fe2+
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 |
How many atoms of each kind are present in the following molecule:
Chlorine
How many electrons are required or released by each atom in carbon tetrachloride to attain the nearest noble gas configuration?
