History of the Periodic Table
Electron Configuration
Properties
Trends
Chemical properties
100
Who invented the periodic table?
Who is Dmitri Mendeleev.
100
What are the four blocks of electron configuration in order of smallest to biggest?
S, P, D, F
100
How reactive are Alkali metals?
Very reactive.
100
What happens to the atomic radius when it moves across a period?
It decreases.
100
What is a chemical property of halogens?
High electronegativities. 7 valence electrons Highly reactive.
200
Who discovered that the elements fit into patterns better when arranged according to atomic number?
Henry Mosely
200
What is the amount of electrons that the s block can hold?
Two Electrons
200
How many electrons are in the outer shell of Alkaline Earth Metals?
It is +2.
200
What happens to the atomic radius when it moves up and down?
It increases.
200
What law states that the physical and chemical properties of the elements are periodic functions of their atomic numbers.
Periodic Law
300
Who discovered similar elements have relative atomic masses?
Doberiner
300
What is the amount of electrons that the p block can hold?
Six Electrons
300
What states of matter do halogens exist in at room temperature?
They are gas, solid, and liquid.
300
What is the effect to the ionization energy when it moves across a period?
It increases.
300
What is the characteristic about the atom that changes under varied conditions?
The atom's radius
400
Who discovered that the mass of an atom was its most important property?
John Dalton
400
What is the energy sublevel that has five electrons?
The D block
400
Why are noble gases considered stable?
The oxidation number of zero prevents the noble gases from forming compounds.
400
What happens to the electronegativity as it moves up and down?
It decreases.
400
What is the difference between alkali metals and noble gases?
Noble gases have all of their valence electrons in the outermost shell and alkali metals don't.
500
Who compiled a periodic table of 56 elements based on the periodicity of the properties?
Meyer
500
What is the maximum number of electrons that energy level 4 can hold?
32 electrons
500
What are the three characteristics of all metals?
They're malleable, ductile, and good conductors of heat and electricity.
500
What happens to the ionization energy when it moves up and down?
It decreases.
500
What is the significance of having the same number of electrons in the outermost shell?
The elements in the same group have the same properties.
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