AP Chem Unit 1 Review

Front

What is an isotope?

Back

Isotopes are variants of a particular chemical element that have the same number of protons but different numbers of neutrons, resulting in different atomic masses.

Front

How does the binding energy of 1s electrons compare to 2s electrons in a PES graph?

Back

1s electrons have a higher binding energy than 2s electrons because they are closer to the nucleus.

Front

What does a larger binding energy in a PES graph indicate?

Back

A larger binding energy indicates that the electrons are closer to the nucleus.

Front

What are ionization energies?

Back

Ionization energies are the energies required to remove electrons from an atom or ion.

Front

How can you determine the group of an element based on its ionization energies?

Back

The pattern of successive ionization energies can indicate the group of the element; for example, a large jump in ionization energy suggests the removal of an electron from a new, more stable electron shell.

Front

What are valence electrons?

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in chemical bonding.

Front

How many valence electrons does an element in group 16 typically have?

Back

Elements in group 16 typically have 6 valence electrons.

Front

What is the significance of the mass spectrum in identifying isotopes?

Back

The mass spectrum shows the relative abundance of different isotopes of an element, allowing for their identification.

Front

What is the relationship between ionization energy and atomic size?

Back

Generally, as atomic size increases, ionization energy decreases because the outer electrons are further from the nucleus and experience less attraction.

Front

What does PES stand for in chemistry?

Back

PES stands for Photoelectron Spectroscopy, a technique used to study the energy levels of electrons in atoms.