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प्रश्न
State Dalton's atomic theory.
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उत्तर
Main postulates of Dalton's atomic theory:
- Matter consists of very small and indivisible particles called atoms.
- Atoms can neither be created nor be destroyed.
- The atoms of an element are alike in all respects, but they differ from the atoms of other elements.
- Atoms of an element combine in small numbers to form molecules.
- Atoms of one element combine with atoms of another element in a simple ratio to form molecules of compounds.
- Atoms are the smallest units of matter which can take part in a chemical reaction.
संबंधित प्रश्न
Fill in the blank
The ..........................of an atom is very hard and dense.
Multiple Choice Questions
The number of electrons in an atom is equal to number of
TRUE \ FALSE
Uranium-235 and uranium-238 both undergo nuclear fission.
On the basis of Rutherford's model of an atom, which subatomic particle is present in the nucleus of an atom?
Name the following:
The element which does not contain any neutron in its nucleus.
Choose the correct option
Rutherford's alpha-particle scattering experiment discovered
Where is the nucleus of an atom situated?
Explain in brief – Lod Rutherford’s experiment which led to the discovery of the atomic nucleus.
‘Electrons revolve around the nucleus in fixed orbits or shells called energy levels’. State how these energy levels are represented.
What is meant by the term nucleus
