Advertisements
Advertisements
प्रश्न
State one observation which shows that atom is not indivisible.
Advertisements
उत्तर
Chadwick discovered neutral particles present in an atom by bombarding light nuclei like beryllium with alpha particles, i.e. helium nuclei.
4Be9 + 2He4 → 6C12 + 0n1
Discovery of the neutron also showed that an atom is divisible.
APPEARS IN
संबंधित प्रश्न
Define a chemical bond.
Give electron dot diagram of the following:
methane
Complete the following:
| Sodium | Phosphorus | Carbon | |
| Formula of chloride | |||
| Nature of bonding | |||
| Physical state of chloride |
A Compound 'X' consists of only molecules. Hence 'X' will have
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 questions based on the table above:
What is the formula of the compound formed between X and Z.
What do you understand by redox reactions? Explain oxidation and reduction in terms of loss or gain of electrons.
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 |
|
|
Identify the following reaction as either oxidation or reduction:
O + 2e- → O2-
Sodium having atomic number 11, is ready to ______ electron/ electrons to attain the nearest noble gas electronic configuration.
Write the basic concept of Kossel – Lewis theory.
