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प्रश्न
Atomic number : ______ :: Mass number : Number of protons and neutrons.
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उत्तर
Atomic number: Number of protons:: Mass number: Number of protons and neutrons.
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संबंधित प्रश्न
Which of the following are isoelectronic species i.e., those having the same number of electrons?
Na+, K+, Mg2+, Ca2+, S2–, Ar
Give reason
Actual atomic mass is greater than mass number.
Match the atomic numbers 4,8,10,15 and 19 with each of the following:
An element which does not form ion
Draw the atomic diagram of the following element showing the distribution of – protons, neutrons and the electrons in the various shell of the atom.
Calcium – \[\ce{^40_20Ca}\]
[The upper number represent the – mass number and the lower number represent the – atomic number e.g. calcium – mass number = 40, atomic number = 20]
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?
Draw the structure of the following atoms showing the nucleus containing – protons, neutrons and the orbits with the respective electron:
Sodium [At. no. = 11, Mass no. = 23]
An element ‘A’ has mass number 23 and atomic number 11. State the –
- no. of neutrons in its shell,
- electronic configuration of the element ‘A’.
The atomic number of an element is 9, it has 10 neutrons. Find the element from the periodic table. What will be its mass number?
Every atom has an equal number of protons and electrons. The nature of the atom is ______.
If element M has mass number 24 and atomic number 12, how many neutrons does its atom contain?
