{"category":"founding","date":{"calendar":null,"day":1,"day_url":"https://kogda.com/1-marta","month":3,"text":"1 марта 1869 года","year":1869,"year_url":"https://kogda.com/1869"},"id":121165,"kind":"event","library":[],"license":"Тексты: Русская Википедия, CC BY-SA 4.0. Люди и места: Wikidata, CC0.","mentions":[],"people":[{"name":"Дмитрий Менделеев","slug":"dmitrij-mendeleev","url":"https://kogda.com/p/dmitrij-mendeleev"}],"places":[],"related":[],"slug":"dmitrij-mendeleev-sostavil-tablicu-sistemy-elementov-1869","source":{"license":"CC BY-SA 4.0","name":"Русская Википедия","url":"https://ru.wikipedia.org/wiki/1_марта"},"summary":null,"text":"","title":"Дмитрий Менделеев составил таблицу системы элементов, основанную на их атомном весе и химическом сходстве","url":"https://kogda.com/e/dmitrij-mendeleev-sostavil-tablicu-sistemy-elementov-1869","weight":179}