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Atomic Structure




                   FAQs
Atomic Structure

What is the order of adding removing electrons
for transition elements?

•   Fill up 4s before 3d.
    e.g. Ti: 1s2 2s2 2p6 3s2 3p6 3d2 4s2

•   Remove from 4s before 3d.
    e.g. Ti+: 1s2 2s2 2p6 3s2 3p6 3d2 4s1
Atomic Structure

When writing electron configuration, can I just
write e.g. 2p or do I need to show 2px 2py 2pz?

•   When asked for electron configuration, you do not
    have to write out the subshells.
    e.g. O: 1s2 2s2 2p4

•   BUT when ask to explain for certain trends related to
    how the electrons are placed in the subshells, you
    NEED to show px, py and pz.
    e.g. O: 1s2 2s2 2px2 2py1 2pz1

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Atomic Structure

  • 2. Atomic Structure What is the order of adding removing electrons for transition elements? • Fill up 4s before 3d. e.g. Ti: 1s2 2s2 2p6 3s2 3p6 3d2 4s2 • Remove from 4s before 3d. e.g. Ti+: 1s2 2s2 2p6 3s2 3p6 3d2 4s1
  • 3. Atomic Structure When writing electron configuration, can I just write e.g. 2p or do I need to show 2px 2py 2pz? • When asked for electron configuration, you do not have to write out the subshells. e.g. O: 1s2 2s2 2p4 • BUT when ask to explain for certain trends related to how the electrons are placed in the subshells, you NEED to show px, py and pz. e.g. O: 1s2 2s2 2px2 2py1 2pz1