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प्रश्न
Name the three fundamental particles of an atom.
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उत्तर
The three fundamental particles of an atom are electron proton and neutron.
APPEARS IN
संबंधित प्रश्न
Fill in the blank
The outermost shell of an atom is known as............................
Fill in the blank
Neutrons are .......................... particles having mass equal to that of protons.
Multiple Choice Questions
number of valence electrons present in magnesium is
What are the two main parts of which an atom is made of?
FILL IN THE BLANK
The electrons revolving in shells close to the nucleus are called ................... electrons.
Tick the most appropriate answer.
In 1908, R A Millikan found the charge of an electron to be
- 1.6 x 10-19 C
- 1.6 x 10-15 C
- 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 ?
Name the negatively charged particle present in the atoms of all the elements.
Define the term Mass number.
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 __________.
