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The 1955 Lincoln Cent is not made of tin. It is composed of 95% copper and 5% zinc.
The first isotope of mendelevium (Es-256) was obtained in 1955 bombarding einsteinium-253 with alpha particles:Es-253(alpha)Md-256 + n
The US program began in 1950 and tested its first device in 1952 and tested a deliverable bomb in 1954. The USSR program began in 1950 and tested a deliverable but limited bomb in 1953 and tested a full scale deliverable bomb in 1955.
The first periodic table was developed by Dmitri Mendeleev in the mid-19th century.He wasn't the only person thinking along those lines ... both John Newlands and Lothar Meyer had proposed similar ideas However, Newlands was largely criticized and ignored at the time, and Meyer didn't make any predictions, so Mendeleev's table (which did make predictions about the properties of several as-yet-undiscovered elements) is generally regarded as the first.
No, there is no credible evidence of it. Sad to say, there is a lot of speculation coming from various websites, but nothing close to actual proof. What we do know is that Einstein was a heavy smoker, and frequently was seen with his favorite tobacco and his pipe. He did not drink much, and claims that he used cocaine or LSD are doubtful-- even Timothy Leary, the biggest proponent of using LSD, stated that to his knowledge, Einstein did not use it. Einstein died in 1955, from internal bleeding caused by a burst blood vessel, or a ruptured abdominal aortic aneurysm-- he had previously had surgery in that same region of his body in 1948; and although some websites have claimed it "could be" caused by cocaine use, that too is difficult to accept, since there are many possible causes of aneurysms. That said, he certainly might have tried a drug at some point in his life, but those who knew him, including biographers, have never reported any ongoing use of drugs.
Mendelevium was first obtained by Glenn Seaborg, Stanley Thompson, Albert Ghiorso, Bernard Harvey, Gregory Choppin in 1955, in USA.
About Chekhov was created in 1955.
Oplatky was created in 1955.
Bilibino was created in 1955.
Nehora was created in 1955.
Skarloey was created in 1955.
The Darfsteller was created in 1955.
Griffelkin was created in 1955.
Gumbasia was created in 1955.
Moomba was created in 1955.
Phileleftheros was created in 1955.
WILL-TV was created in 1955.