Chem Final Exam Prep

Front

What does collision theory state?

Back

Collision theory states that when two molecules collide with sufficient energy and in the proper orientation, a bond is formed.

Front

What action will increase the rate of reaction in a closed container?

Back

Increasing the temperature will increase the rate of reaction.

Front

What are isotopes?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons.

Front

Which isotope of chromium is found in the greatest abundance?

Back

Cr-52 is found in the greatest abundance.

Front

What is the atomic radius?

Back

The atomic radius is the distance from the nucleus of an atom to the outermost shell of electrons.

Front

Why does the atomic radius increase from top to bottom in Group 18 of the Periodic Table?

Back

The atomic radius increases because as the number of shells increases, the distance between the nucleus and valence electrons increases.

Front

What are orbitals in the quantum mechanical atomic model?

Back

Orbitals are regions in an atom where there is a high probability of finding electrons.

Front

Which subatomic particles are described by orbitals?

Back

Electrons are described by orbitals in the quantum mechanical atomic model.

Front

What is the significance of half-filled orbitals?

Back

Half-filled orbitals are significant because they indicate a stable electron configuration that can lead to lower energy states.

Front

What is the average atomic mass?

Back

The average atomic mass is the weighted average of the masses of an element's isotopes based on their natural abundance.