Periodic Trends

What does ionization energy measure?

• ease of removing an electron

• ease of adding an electron

• ability to attract electrons

• energy of nuclear fission

Which of these trends is the OPPOSITE of ionization energy?

• atomic radius

• electron affinity

• electronegativity

• radioactivity

Which has the highest ionization energy?

• F

• Ne

• Cl

• Ar

Which one has the HIGHEST ionization energy?

• C

• N

• O

• F

Which one has the HIGHEST ionization energy?

• He

• Ne

• F

• O

Which group of elements has the LOWEST ionization energy?

• alkali metals

• alkaline earth metals

• halogens

• noble gases

Ionization energy ____________ down a column

Ionization energy ________ from left to right

Why does ionization energy INCREASE moving across a period to the RIGHT?

• more valence electrons

• more energy levels

• Octet Rule

• Hund's Rule

Which has a HIGHER ionization energy?

• Be

• Mg

• Ca

• Sr