There is no element with a "charge of 18". Charges are determined by electrons, so for an atom to have a charge of ±18, it would have to lose or gain 18 electrons - something an atom wouldn't do. Perhaps you mean atomic number of 18, which would be argon or Ar.
Argon is a chemical element with symbol Ar. Its atomic number is 18, and it is a noble gas.
Argon is element number 18, chemical symbol (rather than 'formula'): Ar
Krypton is a chemical element with symbol Kr and atomic number 36. It is a member of group 18 elements.
The Symbol for Neon is Ne. Capital N lowercase e.The symbol for the element, Neon is Ne. It has an atomic number of 10 and can be found in group number 18.
The Latin name for the element Argon is "Argon." In the periodic table, its chemical symbol is Ar, and it has an atomic number of 18.
The symbol for ununoctium is Uuo. Ununoctium is a synthetic element with atomic number 118 and is located in the periodic table's Group 18, known as the noble gases.
The chemical symbol for fluorine isotope with 9 neutrons is 18F (18 is a superscript).
The element with atomic number 18 is Argon. It is a noble gas with the symbol Ar.
Sc3+. Scandium has an atomic number of 21, in Sc3+ the number of electrons is 3 less as it is positively charged.
No, argon is a noble gas with the chemical symbol Ar, while chlorine is a nonmetallic element with the chemical symbol Cl. They are two distinct elements with different properties and characteristics.
Look at the periodic table. You see that the element that has 16 protons is Sulfur. Electrons have a single negative charge, while protons have a single positive charge, so an ion with 2 more electrons than protons will have a charge of 2-. So, the symbol of the ion would be S2- .
Argon is a chemical element with the symbol Ar and atomic number 18. It is a noble gas and its composition is made up entirely of argon atoms.