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प्रश्न
Multiple Choice Questions
The outermost shell of an atom is known as
पर्याय
valency
valence electrons
nucleus
valence shell
उत्तर
valence shell
APPEARS IN
संबंधित प्रश्न
Write true or false for the following statement
The central pad of the atom is called nucleus.
Multiple Choice Questions
number of valence electrons present in magnesium is
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
ANSWER IN DETAIL
Name the three subatomic particles. How are they different from each other ?
ANSWER IN DETAIL
Write a note on valence shell.
Name the negatively charged particle present in the atoms of all the elements.
Define the term Mass number.
With reference to the discovery of the structure of an atom, explain in brief – William Crookes experiment for the discovery of cathode rays, followed by – J.J. Thomsons experiment pertaining to the constituents of the cathode rays. State which sub-atomic particle was discovered from his experiment.
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.
