2.4 Successive Ionization Energies

​Successive Ionization Energies

By Ashley Wiehl

While considering the number of energy shells is an easy way to determine differences in distance between valence electrons and the nucleus, determining the force of attraction the nucleus exerts on the electrons is a little trickier.

Open Ended

How many Ionization Energies does this atom have? How do you know?

Open Ended

What does IONIZATION ENERGY represent happening in the real world?

Multiple Choice

How many electrons are in a neutral atom of this element?

• 9

• 10

• 11

• 12

Multiple Choice

How many protons are in a neutral atom of this element?

• 9

• 10

• 11

• 12

Fill in the Blank

What is the identity of this element?

Labelling

Label the data points

Drag labels to their correct position on the image

3s2

2s1

3s1

2p1

2p6

2s2

1s2

1s1

Draw

1) Circle all data points that represent electrons moved from the valence shell

2) Put an "x" on all data points that represent inner core electrons

Multiple Select

Why are core electrons harder to remove than valance electrons?

• There is no electron shielding for inner electrons

• They experience increased effective nuclear charge

• There is extra shielding for inner electrons

• They experience a decreased nuclear charge

Draw

Draw repulsion arrows that move between valance electrons that occupy the same shell

ex/ <---->

Draw

Often successive Ionization Energies double as each valance electron is removed.

On the model, circle the ions that experience a larger than expected jump.

(circle one for each ion)

Multiple Select

Na+ and Mg+2 are ISOELECTRONIC, meaning that they have the same electron configuration.

Why are the ionization energies so different?

• They have different # of protons, and different nuclear charge

• Due to different nuclear charge, the electrons are being pulled in differently

• Due to their overall charge being different

• They both follow the octet rule and have a full shell of valance electrons.

Open Ended

What do you notice about the successive ionization energies for this element?

(think about the numbers)

Open Ended

In your own words, summarize how Coulomb's Law can be used to predict and explain trends in successive ionization energy.

Use terms "attraction" "nucleus" "core electrons" "ionization energy" "electron shielding" "effective nuclear charge" and "electron-electron repulsion" in your answer for full credit