Well, all these stars have their houses swept quite regularly by people who work in the surveillance security business. They come in and they look for bugs and things. ↗
My husband gave up all his work to stay at home with the kids, and we split all the duties at home. I do all the boring stuff - like pay the bills, and he does all the exercising for both of us, which I'm very grateful for... I thank him for it regularly. ↗
Elements which are similar as regards their chemical properties have atomic weights which are either of nearly the same value (eg. Pt, Ir, Os) or which increase regularly (eg. K, Ru, Cs). ↗