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The tenth element is the noble gas Neon. It is represented by the chemical formula Ne.
It is a chemical element which is a noble gas
Ar is the symbol for the noble gas - argon.
"He" is an element. It is the chemical symbol for helium, which is a noble gas and an element on the periodic table.
A noble gas has a valance of zero, indicating that it does not engage in chemical reactions.
Helium is a nonreactive element called a noble gas.
Argon is a chemical element with symbol Ar. Its atomic number is 18, and it is a noble gas.
Ar is the chemical symbol for the element argon. It is a noble gas and a pure element, not a compound or mixture.
Xenon is an element. It is a noble gas with the chemical symbol Xe and atomic number 54 on the periodic table.
He, helium, is an element. It is a noble gas and it does not form any chemical compounds.
It is NOT the chemical formula, but the chemical symbol. Xenon's chemical symbol is 'Xe'. Note the use of the capital 'X' and the small case 'e'. This is the agreed international standard for all chemical symbols. A formula refers to a molecule consisting of different elements.
A noble gas.