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प्रश्न
Fill in the blank of the following statement :
All the mass of an atom is concentrated in a small region of space called the ___________.
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उत्तर
All the mass of an atom is concentrated in a small region called the nucleus.
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संबंधित प्रश्न
Explain the Mass number with example.
Fill in the Blank of the Following Statement :
An atom has atomic mass number 23 and atomic number 11. The atom has .................... electrons.
(a) What is meant by (i) atomic number, and (ii) mass number, of an element? Explain with the help of an example.
(b) What is the relation between the atomic number and mass number of an element?
(c) If an element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?
Define the following form:
Atomic number
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
Mass no. = 1
If an isotope of ‘H’ has mass no. = 2, how many electrons does it have.
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Silicon [At. no. = 14, Mass no. = 28]
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Isotopes of hydrogen [11H, 21H, 31H]
What are nucleons? How many nucleons are present in Phosphorous? Draw its structure.
When an atom gives electrons from its outermost shell, it becomes ______ charged.
In which one of the following, the number of protons is greater than the number of neutrons but number of protons is less than the number of electrons?
