Advertisements
Advertisements
प्रश्न
How is the size of an atom indicated ?
उत्तर
The size of an atom is indicated by its radius.
APPEARS IN
संबंधित प्रश्न
TRUE \ FALSE
Cathode rays are a stream of fast moving particles that travel in random directions.
WRITE SHORT ANSWER
Define an ionic compound.
ANSWER IN DETAIL
Enlist the features of Bohr’s model of an atom. How did he correct the Rutherford’s model ?
Define:- Atom
Define:- Radicals
Write the names of the elements present in the:-
Ammonia
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
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the mass number of X ?
Fill in the blank
If an atom loses an electron, it acquires ______ a charge.
Why is it not possible to see an atom even with the most powerful microscope ?
Dalton's atomic theory says that atoms are indivisible. Is this statement still valid ? Give reasons for your answer.
Is it possible to see atoms these days ? Explain your answer.
Which of the following statement is correct about the atom of an element ?
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
Name the gas that.
Turns moist starch iodide paper blue black.
Define – Atom.
Which of the following statements made by Dalton has not undergone any change?
Atoms of one element can be transmuted into atoms of other elements by ______
