Answer is: d) 7. Electron configuration: 1s²2s²2p⁵. <span>Valence electrons are in 2s and 2p orbitals. </span>Valence electrons<span> are outer shell </span>electrons (transition metal can have a valence electrons in an inner shell) <span>that is associated with an </span>atom <span>and they can form </span>chemical bond. V<span>alence eletrons determine chemical proporties of element.</span>
