Chemical Families
Atomic History
Periodic Table History
Periodic Trends
100
Describe the valence electrons of transition metals?
There valence electrons are found in more than one outer shell
100
Who first proposed the theory that all matter was made up of atoms and could not be divided further?
Democritus
100
Which scientist had the most contribution to the periodic table
What is Mendeleev
100
Out of Fe, H, and O which of these elements have the highest electronegativity of?
(O)
200
What are the properties of Noble Gases
They have the maximum number of valence electrons and are very stable
200
Name two of Dalton’s main postulates to his atomic theory.
-Matter is composed of very tiny or microscopic particles called "Atom". Atom is an indivisible particle. -Atom can neither be created nor it is destroyed. -Atoms of an element are identical in size, shape, mass and in other properties. -Atoms of different elements are different in properties. -Atoms combine with each other in small whole numbers. -All chemical reactions are due to combinations or separation
200
Was the way the Mendeleev organized his periodic table flawed?
What is yes
200
Do the metalloids or nonmetals have a higher electronegativity?
(Nonmetals)
300
What is the only group with elements that have a magnetic field?
Transition Metals
300
What did Thomson’s cathode ray tube experiment discover? And what postulate did he prove to be incorrect?
-He discovered the electron. Therefore proving that atoms could be split up into smaller parts, and proving of Dalton’s postulate incorrect.
300
What year was the periodic table published
What is 1869
300
What is lowest 1st ionization energy out of the elements Fe, H, and O?
(Fe)
400
An element is solid, has an oxidation number of +2, and has two valence electrons, which group does this element belong to?
Alkaline metals
400
Which scientist created the nuclear atomic model?
Rutherford
400
Why was Mendeleev's periodic table flawed?
Debate it
400
Using a Periodic table find the largest atomic radius out of these elements Fe, H, and O?
(Fe)
500
An unknown element is not ready to be formed into compound is extremely stable, what group does this element belong to?
Noble Gases
500
Bohr’s atomic model was the first to show an atom with what?
It was the first to show electrons traveling in each separate orbits or energy levels. (Also called the planetary model)
500
Defend mosley's reasoning behind his periodic table design
Debate it
500
Using a periodic table which element out of Fe, H, and O have the largest Ionic radius?
(O)
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