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Chapter 5
The Periodic Table and Periodic Law
17
Chemistry
10th Grade
10/11/2010

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Cards

Term
Lothar Meyer and Dmitri Mendeleev
Definition
each demonstrated a connection between atomic mass and elemental properties
Term
Who has been given more credit than Meyer because he published his organization scheme first?
Definition
Mendeleev
Term
How did Mendeleev organize the elements into the first periodic table?
Definition
By arranging the elements in order of increasing atomic mass into columns with similar properties
Term
Who determined that the elements needed to be arranged by atomic number rather than atomic mass?
Definition
Henry Moseley
Term
periodic
Definition
repeating patterns
Term
What are three characteristics of metals?
Definition
shiny, solid at room temperature, good conductors of heat/electricity
Term
What are the three main classifications of elements?
Definition
metals, nonmetals, metalloids
Term
What are three characteristics of nonmetals?
Definition
dull, generally gases, poor conductors of heat/electricity
Term
Metalloids
Definition
elements with physical and chemical properties of both metals and nonmetals
Term
What are the four blocks of the periodic table?
Definition
S P D F
Term
Atomic size
Definition
v - atomic size increases
>- atomic size decreases
Term
ion
Definition
groups of atoms with a positive or negative charge
Term
cation
Definition
an ion with a positive charge
Term
anion
Definition
an ion with a negative charge
Term
Ionization Energy
Definition
v - ionization energy decreases
>- ionization energy increases
Term
electronegativity
Definition
the ability of an atom of an element to attract electrons when the atom is a compound
Term
trends of electronegativity
Definition
v - electronegativity decreases
>- electronegativity increases
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