Advertisements
Advertisements
प्रश्न
Give the charge and the mass of an electron, proton and neutron present in an atom ?
Advertisements
उत्तर
| Particle | Charges | Mass |
| (1) proton | Positive | One atomic mass unit. (amu) |
| (2)electron | Negative | 1/1837 times the mass of one hydrogen atom. |
| (3)Neutron | No charge | One atomic mass unit, equal to mass of proton. |
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
Cathode rays are a stream of fast moving particles that travel in random directions.
Write the names of the elements present in the :-
Sulphuric acid
Fill in the blank
An ion with negative charge is called _______
Define: Mass number
What is the maximum number of electrons present in:
1. first shell
2. second shell
3. third shell and
4. fourth shell
Define: Covalent bond
Fill in the blank
An excess of electrons produces a ________ charge.
What is the usual symbol for (a) and electron (b) a proton, and (c) a neutron?
Electron, proton, neutron are the types of ______ in an atom.
The electron shell ______ is nearest to the nucleus.
In what respects do the three isotopes of hydrogen differ? Give their structures.
Draw diagrams representing the atomic structures of the following:
- Sodium atom
- Chlorine ion
- Carbon atom
- Oxygen ion
Select the correct answer to the statement given below:
Imaginary path around the nucleus of an atom in which electrons revolve.
The electronic structure [configuration] of fluorine can be written as 2, 7. In a similar way give the electronic configuration of phosphorus
An atom of an element has no electron. Will that atom have any mass or not? Can an atom exist without electron? If so then give example.
______ is the smallest particle of an element.
The volume occupied by 4.4 g of CO2 at S.T.P ______
The volume occupied by 1 mole of a diatomic gas at S.T.P is ______
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
