Who created the first periodic table of chemical elements?
Q: Who created the first periodic table of chemical elements?
A: Professor Dmitri Mendeleev created the first periodic table of chemical elements.
Q:How did Mendeleev arrange the elements in his periodic table?
A: Mendeleev arranged the elements from the lightest one to the heaviest one.
Q: What did Mendeleev do when he proposed his periodic table?
A: Mendeleev placed empty spaces between some elements when he proposed his periodic table.
Q:What does the empty spaces in Mendeleev's periodic table indicate?
A: The empty spaces in Mendeleev's periodic table indicate undiscovered elements.
Q: What did Mendeleev predict about the undiscovered elements in his periodic table?
A: Mendeleev predicted the properties of the undiscovered elements in his periodic table.
Q: When did Mendeleev create his periodic table?
A: Mendeleev created his periodic table in 1869.
Q: Why did Mendeleev place empty spaces in his periodic table?
A: Mendeleev placed empty spaces in his periodic table for undiscovered elements.
