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प्रश्न
Fill in the blank of the following statement :
The total number of protons and neutrons in the nucleus of an atom is called its _________.
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उत्तर
The total number of protons and neutrons in the nucleus of an atom is called its mass number.
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संबंधित प्रश्न
What are the atomic numbers of elements whose outermost electrons is represented by 3s1.
The mass number of an element is 18. It contains 7 electrons. What is the number of protons and neutrons in it? What is the atomic number of the element?
What is meant by the 'atomic number of an element'?
Name or state the following:
Elements having same mass number but different atomic number
The diagram represents an isotope of hydrogen [H]. Answer the following:
Atomic no. = 1
Mass no. = 1
Do isotopes have the same atomic number or the same mass number?
From the symbol \[\ce{^4_2He}\] for the element helium, write down the mass number and the atomic number of the element.
Elements A, B and C have atomic numbers 9, 20 and 10 respectively.
- State which one is
(1) a non-metal,
(2) a metal,
(3) chemically inert.[A,B,C] - Write down the formula of the compound formed by two of the above elements.[BA2]
The No. of electrons in the outermost shell of the atom of an inert gas ______.
A ______ number describes a specific aspect of an electron.
K and L shells can accommodate a maximum of 2 and 8 electrons respectively.
