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प्रश्न
Potassium (at No.19) and chlorine (at No.17) react to form a compound. Explain the formation of the compound on the basis of reduction.
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उत्तर
\[\ce{2K + Cl2 -> 2KCl}\]
In the electronic concept, a reduction is a process in which an atom or ion accepts electron(s).
\[\ce{Cl2 + 2e--> 2Cl-}\]
संबंधित प्रश्न
Mention the basic tendency of an atom which makes it to combine with other atoms.
Elements A, B and C have atomic number 17, 19 and 10 respectively.
- State which one is:
- a non-metal
- a metal,
- chemically inert?
-
Write down the formula of the compound formed by two of the above elements.
(i) How many atoms of each kind are present in the following molecules: calcium oxide, chlorine, water, carbon tetrachloride?
(ii) How many electrons are required for their octet structure?
State differences between the properties of ionic compounds and covalent compounds.
In term of electron transfer, define Oxidation
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.
What is the contribution of the following in atomic structure?
Democritus
What is an α (alpha) particle?
State one observation which shows that atom is not indivisible.
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
Why do `""_17^35"CI"` and `""_17^37"CI"` have the same chemical properties? In what respect do these atoms differ?
Explain fractional atomic mass. What is the fractional mass of chlorine?
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 |
|
|
State the type of bonding in the following molecules.
Hydrogen chloride
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 |
The element that would form anion by gaining electrons in a chemical reaction is ______.
Draw the electron distribution diagram for the formation of Carbon di oxide (CO2 ) molecule.
What is meant by a chemical bond?
How many atoms of each kind are present in the following molecule:
carbon tetrachloride
