What is the charge on the resulting ion? How many electrons would be gained or lost to achieve a noble gas configuration? group 15 . Write the element symbol for an element that has this electron-dot formula.
In Group 15, elements have 5 valence electrons. To achieve a noble gas configuration, they need to either gain 3 electrons to have a total of 8 (octet rule) or lose 5 electrons to have 2 (duet rule).
If an element gains 3 electrons, it will have a charge of -3 since it has 3 more electrons than protons. If it loses 5 electrons, it will have a charge of +5 since it has 5 fewer electrons than protons.
The element symbol for an element that has this electron-dot formula would be N if it gains 3 electrons to achieve a noble gas configuration or P if it loses 5 electrons.