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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
What are the atomic numbers of elements whose outermost electrons is represented by 3p5?
Multiple Choice Questions
The sub atomic particle with negative charge is
Fill in the blanks- The number of protons in the nucleus of an atom is called its ....................
Fill in the following blanks in respect of an atom of an element
| No. of protons | No. of neutron | Mass number | Atomic number | No. of electrons | Symbol |
| 11 | 12 | ___________ | ___________ | ___________ | ________ |
The atom of an element X has 7 electrons in its M shell.
What is the atomic number of element X?
An atom of an element has two electrons in the M shell.
What is the (a) atomic number (b) number of protons in this element?
Match the atomic numbers 4,8,10,15 and 19 with the following:
Element with 6 valence electrons
K and L shells can accommodate a maximum of 2 and 8 electrons respectively.
If an atom has 6 electrons in its outermost shell, it is inert.
What is the relation between mass number & atomic number?
