Advertisements
Advertisements
प्रश्न
Name the particles which revolve around the nucleus.
Advertisements
उत्तर
Electron.
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
Elements having a tendency to accept electrons are called metals
TRUE \ FALSE
Cathode rays are a stream of fast moving particles that travel in random directions.
Write the names of `"FeS"` compounds :
Fill in the blank
An ion with negative charge is called _______
What does an atom consist of ? Explain.
What is the maximum number of electrons present in:
1. first shell
2. second shell
3. third shell and
4. fourth shell
State Dalton’s atomic theory.
Name the particle or particles you would expect to find in :
The nucleus of an atom
An atom has 13 protons and 14 neutrons.
What is the atomic number of the atom ?
Name the unit in which the radius of an atom is usually expressed.
Is it possible to see atoms these days ? Explain your answer.
For the symbols H, D and T, write the subatomic particles (protons, neutrons and electrons) found in each one of them.
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Draw the basic structure of an atom representing its –
- Subatomic particles
- Nucleus
- Orbits or shells.
The basic unit of matter is ______.
In the nucleus of `""_20"Ca"^40`, there are ______
Give the salient features of “Modern atomic theory”.
Atomic models have been improved over the years. Arrange the following atomic models in the order of their chronological order
- Rutherford’s atomic model
- Thomson’s atomic model
- Bohr’s atomic model
A small block slides down on a smooth inclined plane, starting from rest at time t = 0. Let Sn be the distance travelled by the block in the interval t = n – 1 to t = n. Then, the ratio `S_n/(S_(n + 1))` is ______.
