Chem Reading 5.3 Parts 4 & 5

What is ionization energy?

• The energy required to add an electron to a gaseous atom

• The energy required to remove the outermost electron from a gaseous atom

• The energy required to split an atom into two

• The energy required to form a chemical bond

According to Coulomb’s law, how does the distance of an electron from the nucleus affect ionization energy?

• The farther the electron, the higher the ionization energy

• The closer the electron, the lower the ionization energy

• The closer the electron, the higher the ionization energy

• Distance does not affect ionization energy

Which of the following elements has the highest first ionization energy based on the given data?

• Sodium (Na)

• Magnesium (Mg)

• Chlorine (Cl)

• Argon (Ar)

Why do noble gases have higher first ionization energies compared to metals?

• They have a lower effective nuclear charge

• They have a higher effective nuclear charge

• They have more valence electrons

• They have fewer valence electrons

What trend in ionization energy is observed as you move from left to right across a period in the periodic table?

• Ionization energy decreases

• Ionization energy remains constant

• Ionization energy increases

• Ionization energy first decreases, then increases