Question

Consider the element scandium.

a. Complete the table below by providing a set of quantum

numbers for the last two electrons in a scandium atom. [4]

   e-​

  Principle quantum number

  Orbital-shape quantum number

  Magnetic quantum number

 Spin quantum number

   1

        2

          b. Provide an orbital diagram of the scandium atom. [2]

c. Provide an orbital diagram of the scandium ion. [2]

Answer 1

Scandium has $21$ electrons.

a)Principal quantum number

$n=3;l=2;m_l=-2;m_s=$ ${+{1\over 2}}$

Orbital quantum number

$1s^2,2s^2,2p^63s^2,3p^6,4s^23d$

Magnetic quantum number

$n=4;l=0;m_l=0;m_s=$ ${+{1\over2}}$

Spin quantum number

$m_s=$ ${+{1\over2}}$

b)

c)