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प्रश्न
Fill in the blank
The outermost shell of an atom is known as............................
उत्तर
The outermost shell of an atom is known as valence shell.
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संबंधित प्रश्न
Give the following a suitable word/phrase
Arrangement of electrons in the shells of an atom.
Multiple Choice Questions
number of valence electrons present in magnesium is
Define the term Atomic number.
Mention briefly the salient features of Dalton’s atomic theory (five points)
FILL IN THE BLANK
Gases become good conductors of electricity under ........ (low/high) pressure and .............. (low/high) voltage electrical discharge.
WRITE SHORT ANSWER
What is the number of neutrons present in a potassium atom ?
Compare an electron, a proton and a neutron in respect of their relative masses and charges.
Define the term Nucleons.
If an atom ‘A’ has an atomic number of eleven, state the number of protons and electrons it contains.
Select the correct answer from the choice in the bracket to complete the sentence:
An element ‘X’ has six electrons in its outer or valence shell. Its valency is __________.
