Unit 1 –Atomic Structure

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Presentation transcript:

Unit 1 –Atomic Structure Learning Target 1.2 – Identify and describe isotopes using mass number, atomic number, and isotope notation

Isotopes Isotopes – atoms that have the same number of protons but a different number of neutrons. Mass Number – is the total number of Protons + Neutrons Atomic Number – is the number of Protons only To determine the number of Neutrons for a given isotope use the following equation Mass Number – Atomic Number = Number of Neutrons

Isotope Notation Isotope notation is a symbol that provides the atomic structure of any given isotope. The symbol includes the following information: Mass Number (upper left-hand corner) Atomic Number (lower left-hand corner) Charge (upper right-hand corner) Note: many isotopes do not have a charge so there may be no information in the upper right-hand corner)

Two ways to write isotope notation Symbol Form & Written Form Note: the written form “C-14” can also be written as Carbon-14