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प्रश्न
What does an atom consist of ? Explain.
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उत्तर
An atom consists protons, electrons and neutrons. Protons are positively charged, electrons have negative charge while neutrons have no charge
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संबंधित प्रश्न
TRUE \ FALSE
Neils Bohr gave the theory to explain the arrangement of protons in an atom.
ANSWER IN DETAIL
Enlist the features of Bohr’s model of an atom. How did he correct the Rutherford’s model ?
Write the names of the elements present in the following compound.
Common salt
Write the names of `("NH"_4)_2"SO"_4` compounds:
Give the charge and the mass of an electron, proton and neutron present in an atom ?
What does the word ‘atom’ mean?
A certain particle ‘X’ has 17 protons, 18 electrons and 20 neutrons.
What is such a particle called ?
Fill in the blank
A deficiency of electrons produces a ________ charge.
What are the building blocks of matter ?
Why is it not possible to see an atom even with the most powerful microscope ?
An atom of an element X may be written as `""_9^4"X"`
(a) What does the figure 9 indicate?
(b) What does the figure 4 indicate?
(c) What is the number of protons in atom X?
(d) What is the number of neutrons in atom X?
(e) What is the number of electrons in atom X?
(f) How many electrons are there in the outermost shell of an atom of element X?
(g) Write the symbol of ion formed by an atom of element X.
Which of the following statement is correct about the atom of an element ?
In what respects do the three isotopes of hydrogen differ? Give their structures.
Elements X and Y have 1 and 7 electrons in their outermost shell respectively.
What will be the charge present of the molecule XY after chemical combination?
A radical take part – unsplit in a chemical reaction and retains its identity in reactions.
With reference to the radical –
- ammonium
- bisulphate
- carbonate
state the group of atoms present in each radical.
Select the correct answer to the statement given below:
Imaginary path around the nucleus of an atom in which electrons revolve.
K: Potassium:: C: ______.
A change in the physical state can be brought about
Does the solubility of a substance change with temperature? Explain with the help of an example.
Lead is also known as plumbum.
