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Question
What are the two main parts of which an atom is made of?
Solution
- The centrally located nucleus
- The outer circular orbits.
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RELATED QUESTIONS
Give the following a suitable word/phrase.
Protons and neutrons present in the nucleus.
Explain the rule with example according to which electrons are filled in various energy levels
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.
Tick the most appropriate answer.
How many times is a proton heavier than an electron?
- 1500
- 1800
- 1840
- none of these
Tick the most appropriate answer
β-particles are actually a stream of
- protons
- electrons
- neutrons
- none of these
WRITE SHORT ANSWER
What is an atom?
The particle not present in an ordinary hydrogen atom is :
State its one drawback of Rutherford’s atomic model.
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.
State how electrons are distributed in an atom. Explain in brief the rules which govern their distribution.
