can you name some gases that fall under the second one?
Helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and the radioactive radon (Rn)
Nonmetal
Six nonmetals are categorised as noble gases: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and the radioactive radon (Rn). In periodic table terms they occupy the outermost right column. They are called "noble gases" in light of their characteristically very low chemical reactivity.
what is the meaning of metals and nonmetals in science It is a chemical element that mostly lacks the characteristics of a metal can you name some of its properties? Physically, they largely exist as diatomic or monatomic gases, with the remainder having more substantial (open-packed) forms, unlike metals, which are nearly all solid and close-packed. which are some of its categories? They can be divided into the two categories of "reactive nonmetal," and "noble gas.
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Nonmetal [SEP] Noble gas
Six nonmetals are categorised as noble gases: helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and the radioactive radon (Rn). In periodic table terms they occupy the outermost right column. They are called "noble gases" in light of their characteristically very low chemical reactivity. They have very similar properties, all being colorless, odorless, and nonflammable. With their closed valence shells the noble gases have feeble interatomic forces of attraction resulting in very low melting and boiling points. That is why they are all gases under standard conditions, even those with atomic masses larger than many normally solid elements.