Answer:
Explanation:
Element Electron configuration Valence electron Ion
for atom configuration
P 1s²2s²2p⁶3s²3p³ 3s²3p³ P⁵⁺
Sn 1s²2s²2p⁶3s²3p⁶4s²
3d¹⁰4p⁶4d¹⁰5s²5p² 5s²5p² Sn⁴⁺
Ni 1s²2s²2p⁶3s²3p⁶4s² 4s²3d⁸ Ni²⁺
3d⁸
Br 1s²2s²2p⁶3s²3p⁶4s² 4s²4d⁵ Br⁻
3d¹⁰4p⁵
O 1s²2s²2p⁴ 2s²2p⁶ O²⁻
An atom's electron configuration is a depiction of the distribution of electrons amongst the orbital shells as well as subshells. The electron configuration is frequently used to define an atom's orbitals in its ground state, but it may also be used to depict an atom which has ionized into a negatively charged ion or positively charge ion by accounting for electron loss or gain in succeeding orbitals. Many of an element's physical and chemical features can be linked to its distinct electron configuration. The distinctive chemistry of the element is determined by the valence electrons, which are electrons in the outermost shell.
