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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
Fill in the blank
Neutrons are .......................... particles having mass equal to that of protons.
Write true or false for the following statement
The central pad of the atom is called nucleus.
Multiple Choice Questions
The outermost shell of an atom is known as
FILL IN THE BLANK
In an atom, the last shell containing electrons is called its..................shell.
WRITE SHORT ANSWER
What is an atom?
State whether the following statement is true or false :
The anode rays obtained from all the gases consist of positively charged particles called protons.
Define the term Nucleons.
Define the term Valence shell.
Draw a neat labelled diagram representing an atom. Name the three sub-atomic particles in the atom and represent them symbolically showing the mass and charge of each. State where the sub-atomic particles are present in the atom.
Write down the names of the particles represented by the following symbols and explain the meaning of superscript and subscript numbers attached.
`""_1"H"^1`, `""_0"n"^1`,`""_(-1)"e"^0`
