The nucleus remain unchanged.
A nitrogen atom typically achieves an octet of electrons in an ionic bond by gaining three electrons to attain a stable octet configuration of 8 valence electrons. This usually occurs when nitrogen forms an ionic bond with elements that readily donate electrons, such as metals.
All halogens have 7 valence electrons. They gain one electron and achieve noble gas electronic configuration
Calcium achieves a stable octet by losing two electrons from its outermost shell, which contains four electrons. By doing so, it attains the electron configuration of the nearest noble gas, argon, with a complete outer shell of eight electrons. This loss of electrons results in the formation of a positively charged ion (Ca²⁺), which is energetically favorable, leading to greater stability. Thus, calcium achieves a stable octet through electron loss rather than gaining or sharing electrons.
either by losing, gaining or sharing electrons.
Gallium can obtain eight outer-shell electrons by forming covalent bonds with other elements that share electrons in a way that achieves a full octet, or by accepting electrons to achieve a stable electron configuration similar to a noble gas.
Atoms can attain the same electron configuration as noble gases by either gaining, losing, or sharing electrons to achieve a full outer shell (valence shell) of electrons. This allows the atom to achieve stability similar to the noble gas configuration.
Krypton could gain a noble gas configuration by either losing 4 electrons to reach the stable configuration of argon or gaining 3 electrons to reach the stable configuration of xenon. This would involve either forming a 4+ cation or gaining a 3- anion.
By gaining, losing or sharing electrons and forming chemical bonds / compounds
Yes, bromine tends to react by gaining electrons to achieve a stable electron configuration. It is a halogen and has seven valence electrons, so it typically gains one electron to complete its octet and attain a stable electronic configuration.
iodine has 7 electrons in the valence shell. and needs one more electron to attain stable noble gas configuration. So it gains one electron and forms iodide ion with charge of -1.
No, chlorine tends to react by gaining electrons. Chlorine is a non-metal and it typically gains one electron to achieve a full octet and attain a stable electron configuration.
Yes, selenium needs to gain 2 electrons to achieve an octet configuration because it has 6 valence electrons in its outer shell. By gaining 2 more electrons, selenium can reach a stable electron configuration with 8 electrons in its outermost shell.