It's easiest to remember the acronym HOFBrINCl (pronounced "hoffbrinkle") when you're memorizing diatomic molecules. Just remember that each element's symbol is included in the acronym, not just the first letter of the element's name.
Hydrogen
Oxygen
Fluorine
Bromine
Iodine
Nitrogen
ChLorine
or use:
Never - Nitrogen
Have - Hydrogen
Fear - Fluorine
Of - Oxygen
Ice - Iodine
Cold - Chlorine
Beer - Bromine
Helium isn't part of this list, so no, it is not diatomic. It is definitely too inert to regularly form diatomic molecules with itself, although someone managed to make it bond with itself at very, very low temperatures. Even then, the two atoms were separated by an entire arm's length...
Blurb on "diatomic" He: http://www.aip.org/pnu/1993/split/pnu118-2.htm
Hope this helps!
When two helium atoms combine, they form a molecule of helium gas (He2), which is also known as a dihelium molecule. This molecule is quite rare and unstable under normal conditions, as helium typically exists as a monoatomic gas.
ONE, Helium is an element, not a molecule.
A molecule of helium is composed of two helium atoms.
helium is an element, it is a mono atomic molecule, He2 .
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When two helium atoms combine, they form a molecule of helium gas (He2), which is also known as a dihelium molecule. This molecule is quite rare and unstable under normal conditions, as helium typically exists as a monoatomic gas.
Helium is an element.
ONE, Helium is an element, not a molecule.
Helium is monoatomic.
A molecule of helium is composed of two helium atoms.
No, helium is an element, not a compound molecule. It is a noble gas with the chemical symbol He and atomic number 2. Helium exists as single atoms and does not form molecules.
Helium is monoatomic.
Helium does not form molecules but exists as individual atoms.
a scale that is diatonic and pentatonic
helium is an element, it is a mono atomic molecule, He2 .
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