Unit 4 PreTest Quick Review

Front

What is the outermost shell that contains electrons called?

Back

Valence

Front

Define Valence Electrons.

Back

Valence electrons are the electrons in the outermost shell of an atom that are involved in forming bonds.

Front

What is a Lewis Structure?

Back

A Lewis structure is a diagram that shows the bonding between atoms of a molecule and the lone pairs of electrons that may exist.

Front

What is the significance of Valence Electrons in chemical bonding?

Back

Valence electrons determine how an atom can bond with other atoms.

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.

Front

What is the difference between an atom and an ion?

Back

An atom is neutral, while an ion is an atom that has gained or lost one or more electrons, resulting in a charge.

Front

What does the term 'Orbit' refer to in atomic structure?

Back

An orbit refers to the fixed path that electrons follow around the nucleus of an atom.

Front

What is the atomic number?

Back

The atomic number is the number of protons in the nucleus of an atom, which determines the element's identity.

Front

What is the role of the nucleus in an atom?

Back

The nucleus contains protons and neutrons and is the center of an atom, providing most of its mass.

Front

Explain the concept of electron configuration.

Back

Electron configuration is the distribution of electrons in an atom's orbitals, which determines its chemical properties.