Mendeleev's Periodic Table
What did Mendeleev do that set him apart from other scientists?
Made accurate predictions about unknown elements and when making the periodic table placed them where they would be located even though they where not discovered yet.
What type of tool is the periodic table?
A predictive tool.
What is the first atom?
Hydrogen. In it's most basic form it's a singular proton.
Who was John Dalton?
John Dalton is the person who came up with the theory of atomic matter.
What year did Mendeleev make his periodic table of elements?
1869
Where is the atomic number located on a element?
The top left.
How many atoms are there that we have observed in nature or in a lab setting?
118 atoms in total. The last atom is Oganesson which is a Noble Gas.
What did J.J. Thomson's atomic model called?
It was called the Plum Pudding model.
What year did the final gap in the periodic table get filled?
2010
Where is the atomic mass located on a element?
The bottom of it.
How are heavy elements made?
Nuclear fusion, the heavy elements that occurred naturally where made via fusion inside of stars.
What was Niels Bohr's atomic model called?
It was called the Planetary model.
Around what time did Mendeleev's periodic table get accepted by other scientists?
Mid 1870s to 1880s
What is the atomic number equal to?
The number of protons.
How are lighter elements made?
Lighter elements are made via nuclear fission which involved the breaking apart of an atoms nucleus.
What was Schrodingers atomic model called?
The Quantom Mechanical model.
What is the actual shape of Mendeleev's periodic table?
Vertical, columnar, and tabular arrangement.
What are the three primary subatomic particles that make up most of the elements in the periodic table.
Protons, Neutrons, and Electrons. Note that It is only most of them because an exception to this would be a singular proton because that would just be a hydrogen atom with a charge of positive one. Elements will always have at least one Proton.
What category of elements are the least reactive?
Noble Gasses.
What was John Dalton's atomic model called?
Dalton's Atomic model.