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Was born on January 27 and died on January 20 he died at the age of 72 be cause of influenza.

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Mendeleev has a very sad childhood. to begin his father became blind the year of Mendeleev birth and died on 1847 and when he graduated his mother died so he was alone without any parents.

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conducted research on organic chemistry after going back to St. Petersburg and getting a master degree

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Mendeleev formulated the periodic law and he knew that there were elements yet to be found so he left gaps in the periodic table

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other than the periodic table he also made science books

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Mendeleev was able to win three awards, Copley Medal, Davy Medal, Demidov Prize were that he won

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stoichiometry is used to help determine the amount or proportion of compound in a chemical reaction.

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Step 1 count how many there is of each element separately on both the reactant and the product side.
step 2 try balancing it but you can ONLY change the COEFFICIENT and NOT the SUBSCRIPT.

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same steps except for its a little bit more complex (meaning you have to do more balancing)

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Some important things I have learned through unit's one and two is :

atoms and molecules are the main things in science atoms and molecules create what we know as matter.

natural and synthetic natural items are items that came from the earth and synthetic items are man-made and were created from natural items.
the law of conservation of mass means that mass cannot be created nor destroyed.
physical and chemical reaction a physical reaction means that an object's appearance is different but the molecules stay the same in a chemical reaction the matter and molecules are created into something new and different.
the periodic table of elements and the periodic table of elements is a graph of all the elements known so far.

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Analytical Chemists, basic laboratory research, they also have to develop products.

Chemical Engineer.  develop and design chemical processes.

Chemistry Teacher. A chemistry teacher is like our science/steam teachers, and they teach us all about science!

Forensic Scientist. Perform chemical, biological, and microscopic analyses on evidence taken from crime scenes