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प्रश्न
Symbols `""_35^79"Br"` and `""^79"Br"` can be written, whereas symbols `""_79^35"Br"` and `""^35"Br"` are not acceptable. Answer briefly.
उत्तर
The general convention of representing an element along with its atomic mass (A) and atomic number (Z) is `""_"Z"^"A""X"`.
Hence, `""_35^79"Br"` is acceptable but `""_79^35 "Br"` is not acceptable
`""^79"Br"` can be written but `""^35"Br"` cannot be written because the atomic number of an element is constant, but the atomic mass of an element depends upon the relative abundance of its isotopes. Hence, it is necessary to mention the atomic mass of an element.
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संबंधित प्रश्न
The quantum numbers of six electrons are given below. Arrange them in order of increasing energies. If any of these combination(s) has/have the same energy lists:
- n = 4, l = 2, ml = –2 , ms = - 1/2
- n = 3, l = 2, ml= 1 , ms = +1/2
- n = 4, l = 1, ml = 0 , ms = +1/2
- n = 3, l = 2, ml = –2 , ms = –1/2
- n = 3, l = 1, ml = –1 , ms= +1/2
- n = 4, l = 1, ml = 0 , ms = +1/2
How many sub-shells are associated with n = 4?
How many electrons will be present in the sub-shells having ms value of - 1/2 for n = 4?
The total number of orbitals in a shell with the principal quantum number n is ______.
The Azimuthal quantum number for the valence electrons of Ga+ ion is ______. (Atomic number of Ga = 31)
The quantum number of four electrons are given below:
- n = 4, l = 2, m1 = - 2, ms = `- 1/2`
- n = 3, l = 2, m1 = 1, ms = `+ 1/2`
- n = 4, l = 1, m1 = 0, ms = `+ 1/2`
- n = 3, l = 1, m1 = 1, ms = `- 1/2`
The correct order of their increasing energies will be:
The correct set of four quantum numbers for the valence electron of potassium (atomic number 19) is ______.
