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प्रश्न
Which of the following statement is always correct?
पर्याय
an atom has equal number of electrons and protons
an atom has equal number of electrons and neutrons
an atom has equal number of protons and neutrons
an atom has equal number of electrons, protons and neutrons
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उत्तर
An atom has equal number of protons and electrons
An atom always has equal number of protons and electrons in order to maintain electrical neutrality.
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संबंधित प्रश्न
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.
What are the observations of the experiment done by Rutherford in order to determine the structure of an atom?
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
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.
WRITE SHORT ANSWER
What is the number of neutrons present in a potassium atom ?
Name the negatively charged particle present in the atoms of all the elements.
State whether the following statement is true or false :
The anode rays obtained from all the gases consist of positively charged particles called protons.
Name the three fundamental particles of an atom.
State how electrons are distributed in an atom. Explain in brief the rules which govern their distribution.
