Senior Congregate Care. What is congregate housing? Congregate housing is an environment thatâs designed to cater for the housing needs of seniors and disabled persons. Residents of a congregate housing complex have private apartments but share a common dining room, kitchen facilities, and other amenities. The purpose of this arrangement is to allow seniors to continue living an independent life although assisted with such tasks like cooking.
The Russian chemist Dmitri Mendeleev was the first scientist to make a periodic table similar to the one used today. Mendeleev arranged the elements by atomic mass, corresponding to relative molar mass.
Lothar Meyer, for example, had proposed a rough periodic table in 1864 and by 1868 had devised one that was very similar to Mendeleevâs, but he did not publish it until 1870. John Newlands published a periodic table in 1865.is father died when Mendeleev was just 13 and the glass factory burned down when he was 15. Aged 16, he moved to Saint Petersburg, which was then Russiaâs capital city. He won a place at his fatherâs old college, in part because the head of the college had known his father.