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प्रश्न
What is atomic number?
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उत्तर
The number of electrons or protons in an atom is called the atomic number of that atom. It is represented by the letter Z.
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संबंधित प्रश्न
Multiple Choice Questions
The sub atomic particle with negative charge is
FILL IN THE BLANK
Rutherford won the Nobel Prize in 1908 for his investigations in the field of ......................
TRUE \ FALSE
After the emission of a beta-particle, the atomic number of the atom increases by one.
Elements X, Y and Z have atomic numbers 6, 9 and 12 respectively. Which one:
- Forms an anion
- Forms a cation
- Has four electrons in its valence shell?
From the symbol `""_2^4"He"` for the element helium, write down the mass number and the atomic number of the element.
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element with four shells
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The No. of electrons in the outermost shell of the atom of an inert gas ______.
In which one of the following, the number of protons is greater than the number of neutrons but number of protons is less than the number of electrons?
