10. Periodic Properties of the Elements

Rank the following elements in order of increasing ionization energy:Br, F, Ga, K and Se.

Which of the following has the highest ionization energy? 

The energy of an electron in a one-electron atom or ion equals (–2.18 x 10^–18 J) (Z²/n²). Estimate the ionization energy for the valence electron of the Li atom and compare it to its theoretical value of 520 kJ/mol.

Write a chemical equation representing the second ionization energy for lithium. Use e⁻ as the symbol for an electron.

What is the reaction that corresponds to the first ionization energy of sodium, Na?

Order the elements S, Cl, and F in terms of increasing ionization energy.

Which best explains why ionization energy tends to decrease from the top to the bottom of a group?

As you move from top to bottom within a group, the first ionization energy ________.

What is the general trend in ionization energy as you move down a column in the periodic table?

As you go from left to right across a period the first ionization energy generally?

As you go from left to right across a period the first ionization energy generally?

What trend in ionization energy do you see as you move down a group?