necessary to form their own government, but the representatives of the states of new jersey, pennsylvania de laver, maryland and south carolina, as well as new york, were not ready to support the resolution that day, the vote was postponed until july 2, when 12 colonies voted in favor of abstaining. new york only. after 2 days, the famous declaration of independence, drawn up by thomas jefferson frankly, was adopted. and other founding fathers of the united states on june 7, 1903 at the chemical congress in berlin, german scientists willy markwald announced the discovery of a new chemical element, polonium. he recognized the priority of the french physicists marie and pierre curie who had discovered polonium 4 years earlier. mark wald had conducted his research and also discovered polonium, but later called it radiotelurium. at first he left that these were different elements, but then he admitted his mistake; polonium is very radioactive, it is not visible and does not exist in a free state. it is a decay product. uranium with a very short half-life already in in 1910, marie pierre, then already