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parcerita
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how many elements are there in group 18?
The elements in Group 18 of the periodic table are Helium, Neon, Argon, Krypton, Xenon, and Radon. They are also known as the noble gases.
Group 18 elements are characterized by their full outer electron shells, making them stable and unreactive. They are colorless, odorless, and have low boiling and melting points.
Group 18 elements are called noble gases because they were once believed to be completely inert and unable to react with other elements. The term "noble" refers to their lack of chemical reactivity.
Helium is used in balloons, neon is used in neon lights, and argon is used in light bulbs. Krypton and xenon have various uses in lighting and medical imaging. Radon is used in some cancer treatments.
Group 18 elements are located in the far-right column of the periodic table, also known as the noble gas group. Their properties, such as their full outer electron shells and low reactivity, are a result of their electronic configurations and their high ionization energies.