Advertisements
Advertisements
प्रश्न
Why is an atom neutral inspite of the presence of charged particles in it?
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
Give the following a suitable word/phrase.
Protons and neutrons present in the nucleus.
Give the following a suitable word/phrase.
The sum of the number of protons and neutrons of an atom.
Multiple Choice Questions
number of valence electrons present in magnesium is
FILL IN THE BLANK
The γ-rays are............................ radiations, like light.
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
WRITE SHORT ANSWER
Describe a discharge tube.
WRITE SHORT ANSWER
What is the number of neutrons present in a potassium atom ?
ANSWER IN DETAIL
What is the maximum number of electrons that L shell can accommodate ? Give reasons for your answer.
Name the three fundamental particles of an atom.
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.
