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प्रश्न
What is meant by the term subatomic particles?
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उत्तर १
“Particles into which an atom is divided are called subatomic particles.” Protons, electrons, neutrons.
उत्तर २
Subatomic particles: A subatomic particle is a structural and functional unit of matter. That means all the matters are made up of these fundamental particles. According to modern atomic theory, an atom has a nucleus, which is present in its centre or core. These nucleus contain subatomic particles like protons and neutrons.
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संबंधित प्रश्न
Give the following a suitable word/phrase.
The electrons present in the outermost shell.
Give the following a suitable word/phrase.
The smallest unit of an element which takes part in a chemical reaction.
Multiple Choice Questions
number of valence electrons present in magnesium is
Name three fundamental particles of the atom. Give the symbol with charge, on each particle.
Tick the most appropriate answer
β-particles are actually a stream of
- protons
- electrons
- neutrons
- none of these
WRITE SHORT ANSWER
What do you mean by electron transition?
WRITE SHORT ANSWER
Name the isotopes of hydrogen.
Explain how the modern atomic theory contradicted Dalton’s atomic theory.
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.
Write down the names of the particles represented by the following symbols and explain the meaning of superscript and subscript numbers attached.
`""_1"H"^1`, `""_0"n"^1`,`""_(-1)"e"^0`
