Question

unruly elements
mg - 24 zn - 65 cd - 112
al - 27 p - 31 in - 115
si - 28? - 70 sn - 119
what invention helped identify elements by reading each ones unique color spectrum?
dimitri mendeleev
where is he from?
what university did he attend?
in the mid - 1800s, there were deep discussions in chemistry about what?
by the late 1800s, chemists were trying to find a new uniform system for what?
what was mendeleev trying to do at the university when he made his discovery?
mendeleev realized that he needed to find what in writing the second book?
mendeleev realized what good way of organizing the elements?
mendeleev kept elements with similar chemical properties in the same what?
what did periodic law determine in advance? the ____ and ____ properties of an element.
what was so different about the new gases? they didnt ____________ with any other elements.
where did they go on the periodic table? mendeleev put in a new ____________ group 18 on the right side of the table.
what were the new gases called? the ______ gases

Explanation:

Dmitri Mendeleev was a Russian chemist. He attended Saint - Petersburg University. In the mid - 1800s, there were discussions about atomic weight in chemistry. By the late 1800s, chemists were trying to find a new uniform system for elements. Mendeleev was writing a chemistry textbook when he made his discovery. He realized he needed to find a way to organize elements. He used atomic weight as a good way to organize them, keeping elements with similar chemical properties in the same group. The Periodic Law determined the existence and properties of an element in advance. The new gases didn't react with other elements, were put in a new group (Group 18) on the right side of the table and were called noble gases.

Answer:

• Where is he from? Russia
• What university did he attend? Saint - Petersburg University
• In the mid 1800s, there were deep discussions in chemistry about what? Atomic weight
• By the late 1800s, chemists were trying to find a new uniform system for what? Elements
• What was Mendeleev trying to do at the university when he made his discovery? Writing a chemistry textbook
• Mendeleev realized that he needed to find what in writing the second book? A way to organize elements
• Mendeleev realized what good way of organizing the elements? Using atomic weight
• Mendeleev kept elements with similar chemical properties in the same what? Group
• What did Periodic Law determine in advance? The existence and properties of an element
• What was so different about the new gases? They didn't react with any other elements
• Where did they go on the Periodic Table? Put in a new group (Group 18) on the right side of the table
• What were the new gases called? Noble gases