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"Always" is a very strong word. If you're in grade school, any of the noble gases, but if you're in high school or above, you should know that they aren't truly chemically inert and under certain conditions even helium can be induced to form "compounds" of a sort, such as the HHe+ ion.
What else can I help you with?
Is silicon monoatomic?
Yes, silicon is a chemical element that exists as a single atom in its elemental form. It is the second most abundant element in the Earth's crust after oxygen.
Is sodium mono atomic or diatomic?
Sodium is a monoatomic element, meaning it exists as single atoms in its elemental form. Each sodium atom has one electron in its outer shell.
What element always exists in monatomic form?
The noble gases always exist in monatomic form: Helium, Neon, Argon, Krypton, Xenon, and Radon.
Is helium a compound molecule?
Helium is a chemical element, not a compound; also helium is monoatomic.
What is neon's ion formula?
Neon is a noble gas and does not form ions.
Is silicon monoatomic?
Yes, silicon is a chemical element that exists as a single atom in its elemental form. It is the second most abundant element in the Earth's crust after oxygen.
Is sodium mono atomic or diatomic?
Sodium is a monoatomic element, meaning it exists as single atoms in its elemental form. Each sodium atom has one electron in its outer shell.
Is sulfur a mono atomic element?
Sulfur can form many strange allotropes; see the link below.
How magnesium is monoatomic?
Magnesium is considered a monoatomic element in its elemental form, meaning it exists as individual atoms rather than in molecular or ionic forms. In its gaseous state, magnesium can exist as monoatomic magnesium (Mg) under high temperatures where the atoms are sufficiently energized to overcome intermolecular forces. However, under standard conditions, magnesium typically exists as a solid with a metallic lattice structure, composed of many atoms bonded together. Thus, while it can be monoatomic in specific conditions, it is primarily found in a more complex form in nature.
What element always exists in monatomic form?
The noble gases always exist in monatomic form: Helium, Neon, Argon, Krypton, Xenon, and Radon.
Is helium a compound molecule?
Helium is a chemical element, not a compound; also helium is monoatomic.
What is neon's ion formula?
Neon is a noble gas and does not form ions.
Is oxygen element monoatomic or diatomic?
Oxygen can either be diatomic, monoatomic and triatomic. The question is which one is the most stable. The most stable is obviously diatomic oxygen O2. Next is triatomic (ozone) O3 and the least stable (very unstable) is monoatomic. Monoatomic oxygen is very shortly living species combining easily (due to very high electronegativity) with large number of elements including another oxygen atom. If we are required to say which is the most common form of oxygen then we need to say it is diatomic O2 existing at room temp and atmospheric pressure as a gas.
Is helium element or compound?
Helium is an element. It is a noble gas with the atomic number 2 and is the second lightest element in the periodic table. Helium exists as single atoms and does not form compounds with other elements.
What element's atoms form diatomic molecules as a liquid?
Bromine is the only element that is liquid and forms diatomic molecules Br2. Mercury is also an element and is liquid but is monoatomic.
Is sulfur monoatomic?
No. At room temperature sulfur forms a ring-shaped eight-atom molecule.
Which element exists in its pure form?
gold
