AP Chemistry Unit 1 Review Questions

Front

What is the electron configuration of a transition metal?

Back

An example of an electron configuration of a transition metal is 1s2 2s2 2p6 3s2 3p6 4s2 3d8.

Front

How does the first ionization energy of iodine compare to that of fluorine?

Back

The first ionization energy of iodine is less than that of fluorine because iodine's electrons are farther from the nucleus and experience less effective nuclear charge.

Front

What happens to atomic radius as you move across the periodic table from left to right?

Back

The atomic radius decreases because the number of protons increases, leading to a greater attraction to electrons.

Front

Which isotope of chlorine is most abundant based on mass spectrum?

Back

The most abundant isotope of chlorine is 35Cl.

Front

What is NOT classified as a pure substance?

Back

Carbonated water is NOT classified as a pure substance.

Front

Define ionization energy.

Back

Ionization energy is the energy required to remove an electron from an atom in the gas phase.

Front

What is the trend of ionization energy in the periodic table?

Back

Ionization energy generally increases across a period and decreases down a group.

Front

Explain effective nuclear charge.

Back

Effective nuclear charge is the net positive charge experienced by an electron in a multi-electron atom, accounting for shielding by other electrons.

Front

What is the significance of the mass spectrum in chemistry?

Back

The mass spectrum helps identify the abundance and mass of isotopes of an element.

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout.