Write the atomic symbol for each of the following: (4.5) a....

Write the atomic symbol for each of the following: (4.5)
a. an aluminum atom with 14 neutrons
b. an atom with atomic number 26 and 32 neutrons
c. a lead atom with 125 neutrons
d. an atom with a mass number of 72 and atomic number 33

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Key Concepts

Atomic Symbol Notation

Atomic symbol notation is a shorthand method used to represent an element and its isotopic form. It typically includes the element's symbol, with the atomic number (number of protons) as a subscript and the mass number (total number of protons and neutrons) as a superscript. This compact form helps in quickly conveying key properties of an atom.

Atomic Number

The atomic number, denoted by the subscript in the atomic symbol, is the number of protons in the nucleus of an atom. It uniquely identifies an element and determines its chemical behavior and position in the periodic table.

Mass Number

The mass number is the sum of protons and neutrons in the nucleus of an atom and is denoted by the superscript in the atomic symbol. It distinguishes different isotopes of the same element, as isotopes have the same atomic number but different numbers of neutrons.

Neutron Number Calculation

The neutron number in an atom is determined by subtracting the atomic number from the mass number. This calculation is fundamental when identifying or writing the atomic symbol for various isotopes, as changes in the number of neutrons do not affect the element's identity but do influence its atomic mass.

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