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Question
Multiple Choice Questions
number of valence electrons present in magnesium is
Options
two
three
four
five
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Solution
two
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RELATED QUESTIONS
Fill in the blank
Neutrons are .......................... particles having mass equal to that of protons.
Write true or false for the following statement
The maximum number of electrons in the first shell can be 8.
Tick the most appropriate answer.
In 1908, R A Millikan found the charge of an electron to be
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- 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 ?
Compare an electron, a proton and a neutron in respect of their relative masses and charges.
Name the three fundamental particles of an atom.
State its one drawback of Rutherford’s atomic model.
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What is meant by the term subatomic particles?
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`
