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प्रश्न
Why is an atom neutral inspite of the presence of charged particles in it?
उत्तर
An atom consists of protons which are positively charged, neutrons which are neutral and electrons which are negatively charged. The number of electrons is same as the number of protons. So, the two opposite charges balance each other and the atom remains neutral.
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संबंधित प्रश्न
Write true or false for the following statement
The central pad of the atom is called nucleus.
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
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 and a proton in respect of mass and charge.
State the location of electrons, protons and neutrons in an atom.
Name the three fundamental particles of an atom.
Define the term Mass number.
Explain how the modern atomic theory contradicted Dalton’s atomic theory.
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`
