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 atom with 22 protons and 26 neutrons
b. an atom with 12 protons and 14 neutrons
c. a gallium atom with a mass number of 71
d. an atom with 30 electrons and 40 neutrons

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Key Concepts

Neutral Atom and Electron Count

In a neutral atom, the number of electrons is equal to the number of protons. This concept is essential when deducing the atomic number from a given electron count, ensuring the atom's overall electrical neutrality.

Atomic Symbol Representation

Atomic symbol representation is a method of writing out an atom's identity through a combination of its element symbol, atomic number, and mass number. This notation provides a compact way to indicate both the elemental identity and the isotope of the atom.

Neutron Number

The neutron number refers to the number of neutrons in an atom's nucleus. It can vary among atoms of the same element, resulting in different isotopes, and when combined with the atomic number, it determines the mass number.

Mass Number

The mass number is the sum of an atom's protons and neutrons. It appears as a superscript to the left of the element's symbol in standard isotope notation and is critical for identifying the particular isotope of an element.

Atomic Number

The atomic number is the number of protons in an atom. It uniquely identifies the element and is typically written as a subscript on the left side of the atomic symbol in isotope notation.

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