List the following ions in order of increasing radius: li+, mg2+, br-, te2. how did you come to your conclusion?

Cr(oh)3 -> cr(3+) + 3oh-

Order of filling levels and sublevels of electrons: 1s²2s²2p⁶3s²3p⁶4s²3d¹⁰4p⁶5s²4d¹⁰5p⁶6s²3f¹⁴5d¹⁰6p⁶for an element with 5 electrons in the 3d energy level: full configuration: 1s²2s²2p⁶3s²3p³.

It starts to rust i think