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Part B Identify the sets of quantum numbers that describe all the electrons in the ground state of a neutral beryllium atom, Be. Each set is ordered (n, l, me, ms). Drag the appropriate items to their respective bins. View Available Hint(s) Reset Help 2,0,0,1/2 2,1,-1,1/2 2,1,0,1/2 1,0,0,-1/2 2,1,-1,-12 1,0,0,1/2 2,1,0,-1/2 2,0,0,-1/2 Electrons in Be Electrons not in Be Submit​

Respuesta :

Answer: The set of quantum numbers for the electrons in Be atom are (2, 1, -1, 1/2), (1, 0, 0, 1/2), (1, 0, 0, -1/2) and (2, 0, 0, -1/2)

Explanation:

There are 4 quantum numbers:

  • Principal Quantum number (n) specifies the energy of the electron in a shell.
  • Azimuthal Quantum number (l) specifies the shape of an orbital. The value of it lies in the range of 0 to (n-1)
  • Magnetic Quantum number (m) specifies the orientation of the orbital in space. The value of it lies in the range of -l to +l
  • Spin Quantum number (s) specifies the spin of an electron in an orbital. It can either have a value of [tex]+\frac{1}{2}[/tex] or [tex]-\frac{1}{2}[/tex]

Berylium (Be) is the 4th element of periodic table having electronic configuration of [tex]1s^22s^2[/tex]

  • For electrons in 1s-orbital, the quantum numbers can be:

For first electron:

[tex]n=1\\l=0\text{ (for s-subshell)}\\m=0\\s=+\frac{1}{2}[/tex]

For second electron:

[tex]n=1\\l=0\\m=0\\s=-\frac{1}{2}[/tex]

  • For electrons in 2s-orbital, the quantum numbers can be:

For first electron:

[tex]n=2\\l=0\text{ (for s-subshell)}\\m=0\\s=+\frac{1}{2}[/tex]

For second electron:

[tex]n=2\\l=0\text{ (for s-subshell)}\\m=0\\s=-\frac{1}{2}[/tex]

Hence, the set of quantum numbers for the electrons in Be atom are (2, 1, -1, 1/2), (1, 0, 0, 1/2), (1, 0, 0, -1/2) and (2, 0, 0, -1/2)

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