Looking inside or using metal objects are two things to avoid when 1. you are using a telescope 2. using a spectroscope 3. using a microwave 4. fixing your computer​

If it is an isoelectronic series select true, if not select false. o2-, s2-, se2-, te2- na+, k+, rb+, cs+ n3-, p3-, as3-, sb3- ag, cd+, sn3+, sb4+ f-, cl-, br-, i- f-, ne, na+, mg2+ s2-, s, s6+