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प्रश्न
Multiple Choice Questions
number of valence electrons present in magnesium is
विकल्प
two
three
four
five
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उत्तर
two
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संबंधित प्रश्न
Multiple Choice Questions
The outermost shell of an atom is known as
FILL IN THE BLANK
Gases become good conductors of electricity under ........ (low/high) pressure and .............. (low/high) voltage electrical discharge.
Tick the most appropriate answer
β-particles are actually a stream of
- protons
- electrons
- neutrons
- none of these
TRUE \ FALSE
Electrons are present in the nucleus.
WRITE SHORT ANSWER
Name the isotopes of hydrogen.
Compare a proton and a neutron in respect of mass and charge.
State the location of electrons, protons and neutrons in an atom.
State its one drawback of Rutherford’s atomic model.
Define the term Valence shell.
Select the correct answer from the choice in the bracket to complete the sentence:
A ________ is a sub-atomic particle with no charge and unit mass.
