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प्रश्न
Write the names of `"Na"_3"PO"_4` compounds :
उत्तर
`"Na"_3"PO"_4` - Sodium Phosphate
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संबंधित प्रश्न
TRUE \ FALSE
Cathode rays are a stream of fast moving particles that travel in random directions.
WRITE SHORT ANSWER
What is radioactivity?
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Define:- Radicals
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Common salt
Define: Relative atomic mass
Write electronic configuration of oxygen, fluorine, sodium, silicon, argon.
Who originated the word ‘atom’ ?
What does the word ‘atom’ mean?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is the mass number of X ?
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An _______ is electrically neutral.
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Is it possible to see atoms these days ? Explain your answer.
What is an atom ? How do atoms usually exist ?
Give scientific reason.
All the mass of an atom is concentrated in the nucleus.
Match the pairs.
| Group 'A' | Group 'B' |
| a. Proton | i. Negatively charged |
| b. Electron | ii. Neutral |
| c. Neutron | iii. Positively charged |
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
Which element will lose electron?
Assertion: An atom is electrically neutral.
Reason: Atoms have equal number of protons and electrons.
Draw the structure of an atom and explain the position of the sub-atomic particles.
Define the following term with an example.
Metalloid
