When the element bonds with another element it accepts electrons (it does not give them away) and becomes negatively charged.
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An element that forms an anion gains electrons to achieve a full outer electron shell, resulting in a negative charge. Anions are generally larger in size compared to their corresponding neutral atoms due to the addition of extra electrons. These anions tend to have higher electron affinity and may participate in ionic bonding with cations to form compounds.
A single element cation and single element anion form a binary ionic compound, where one element is a metal and the other is a nonmetal. The metal forms the cation by losing electrons, while the nonmetal forms the anion by gaining electrons. Examples include NaCl (sodium chloride) and KBr (potassium bromide).
Chlorine is a basic anion. It typically forms chloride ions (Cl-) by gaining an electron, making it negatively charged.
No, an anion does not always form a covalent bond. An anion can form both ionic and covalent bonds depending on the nature of the element it is bonding with. In an ionic bond, an anion will typically form a bond with a cation through the transfer of electrons, while in a covalent bond, an anion will share electrons with another element.
The element with 10 electrons in its neutral state is neon (atomic number 10). When it forms an anion with a 2- charge, it gains 2 electrons to have a total of 12 electrons, taking on the electron configuration of the noble gas, argon.
Selenium is an non-metal element that can exist in various oxidation states, including as a cation (Se^2+) or an anion (Se^2-, Se^4-, etc.). The oxidation state of selenium determines whether it acts as a cation or anion in a given compound.