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प्रश्न
Name the unit in which the radius of an atom is usually expressed.
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उत्तर
The radius of an atom is usually expressed in nanometre (nm).
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संबंधित प्रश्न
MATCH THE COLUMNAS
| 1. Jpham Dalton | a. Neutrons |
| 2. Atom | b. Model of the atom |
| 3. Chadwick | c.The atomic theory of matter |
| 4. Rutherfrod | d. Positively charged |
| 5. Protons | e. Electricity neutral |
| 6. Nuclear fusion | f. Generator of electricity |
| 7.Gamma -rays | g. High penetrating power |
| h.Energy in sun |
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
Define:- Atom
Define:- Radicals
Write the names of `"FeS"` compounds :
Name two particles found inside the nucleus. What are they collectively called ?
Give two examples for each of ionic and covalent bond.
Who originated the word ‘atom’ ?
How did Neils Bohr visualise the atom ?
How is the size of an atom indicated ?
The electron shell ______ is nearest to the nucleus.
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
The smallest particle of matter that can exist by itself is ______.
The basic unit of matter is ______.
Name the sub-atomic particles.
Define the following term with an example.
Compound
Define the following term with an example.
Metal
In all atoms of an element
Statement I: Atoms are electrically neutral as they contain equal number of positive and negative charges.
Statement II: Atoms of each element are stable and emit their characteristic spectrum.
In the light of the above statements, choose the most appropriate answer from the options given below:
