Scientists
Parts of the P.T
Trends
Characteristics
Cations/ Anions
100
Which scientist published the classification system?
J. W. Dobereiner
100
Groups going across are called:
Periods
100
Atomic radius _______ as you go right to left in the periodic table because_______
Decreases because the number of protons in the nucleus increases
100
1.What are three common properties of metals?
They have luster, they are malleable, they are good conductors
100
Is Lithium more likely to form a cation or an anion?
Cation
200
Who published the first periodic table?
Dmitri Mendeleev
200
What family is Chlorine in on the periodic table?
Halogens
200
What group of elements have the greatest electron affinity. Why?
Halogens because they only need one more electron to have a noble gas electron configuration
200
Why are noble gases nonreactive?
Their orbitals are full of electrons
200
Is Fluorine more likely to form a cation or an anion?
Anion
300
Which scientist published an identical periodic table that didn't get credit?
Lothar Meyer
300
What is the name of the family located in 1A?
Alkali Metals
300
What is the definition of electronegativity?
The tendency for an atom to attract electrons to itself when chemically combined with another element
300
Why do elements that are in the same group have similar properties?
They have the same number of valence electrons
300
How are positive and negative ions formed?
When electrons are transferred between atoms
400
Who arranged the periodic table by atomic number?
Henry Moseley
400
The ‘d’ filling block is located where?
In the middle, columns 3B-12B
400
Where does the the trend for ionic size “reset”?
The staircase because metals form positive ions and nonmetals form negative ions
400
Is an element that is soft and able to be cut cleanly likely to be a metal or nonmetal?
Metal
400
Atoms of metals tend to form ions by ______ one or more electrons from their highest occupied energy levels.
Losing
500
Who created the Law of Octaves?
Newland
500
The nonmetal elements in the periodic table are located toward the ______ of the staircase.
Right
500
______ is the energy required to remove the first electron of an element.
First ionization energy
500
What are the three classes of elements that have unique characteristics?
Metals, nonmetals, metalloids
500
Is a positive ion larger or smaller than a neutral atom?
Smaller
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