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प्रश्न
Fill in the blank
The outermost shell of an atom is known as............................
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उत्तर
The outermost shell of an atom is known as valence shell.
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संबंधित प्रश्न
Name three fundamental particles of the atom. Give the symbol with charge, on each particle.
What are the observations of the experiment done by Rutherford in order to determine the structure of an atom?
Tick the most appropriate answer.
Which of the following scientists observed that cathode rays consists of negatively charged particles?
- John Dalton
- J J Thomson
- James Chadwick
- Democritus
Tick the most appropriate answer.
In 1908, R A Millikan found the charge of an electron to be
- 1.6 x 10-19 C
- 1.6 x 10-15 C
- 1.4 x 10-19 C
- 1.6 x 19-16 C.
WRITE SHORT ANSWER
What is an atom?
WRITE SHORT ANSWER
What is the charge on a neutron ?
State whether the following statement is true or false :
The anode rays obtained from all the gases consist of positively charged particles called protons.
Compare an electron, a proton and a neutron in respect of their relative masses and charges.
Compare a proton and a neutron in respect of mass and charge.
Draw a neat labelled diagram representing an atom. Name the three sub-atomic particles in the atom and represent them symbolically showing the mass and charge of each. State where the sub-atomic particles are present in the atom.
