Ch 5 Classification of Elements
5-1: Arranging the Elements
The arrangement of elements in the periodic table brought ______________________________ to facts
and helped chemists predict the existence of ____________________________ yet to be discovered.
Hidden Pattern

Russian scientist ________________________ ____________________________ uncovered a
huge collection of _______________________ about the 63 ________________________ that
had been discovered.

His clues were _______________________ properties and ______________________ properties
and he recognized some elements were ________________________.

His discovery helped scientists predict the existence of ____________________ that had not
been discovered yet.

He designed the ______________________ _______________________ where the elements are
arranged in order of increasing _____________________ _________________.
Modern Periodic Table
British scientist _______________________ ___________________________ determined the atomic
numbers of elements ____________ years after Mendeleev developed the periodic table.
His discovery led to a change in arrangement of the periodic table to elements being arranged in
increasing order of ________________________ ________________________.
The ______________________ ____________________ states that the physical and chemical properties
of the elements are periodic _______________________ of their atomic ______________________.
The periodic lawn forms the basis of the modern periodic ___________________________________.
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Ch 5 Classification of Elements
Design of the Periodic Table
The _______________________ ________________________ is one of the most important tools of a
scientist.
The periodic Table is a ________________________________ system.
Columns in the Periodic Table
Columns of elements are called _______________________ or __________________________.
Elements in same group/family have ______________________ but not _______________________
properties.
Rows in the Periodic Table
Each horizontal row on the periodic table is called a _______________________________.
Elements in a row are not ____________________________ in properties.
Element Key
Important information about an element is given in each square of the periodic table.
1.
2.
3.
4.
The number at the top: ________________________ _________________________
The letter or letters in middle: _______________________ ______________________
Chemical ______________________________ is spelled out.
The number near the bottom: ______________________ ________________________
The Atomic Number is the number of _______________________________.
No two elements have the same ______________________________ ___________________________
Metals
_________________________ of the 109 know elements are metals.
All elements to the _________________________ of the dark zig-zag line on periodic table are metals.
Physical Properties of Metals:
1. Luster
2. Allow ________________________ & ____________________________ to move through them
3. Most are ______________________________
4. Most are ______________________________
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Ch 5 Classification of Elements
Chemical Properties of Metals:
1. Depend upon the ____________________________ arrangement in the atoms of the element.
(Specifically the number of electrons in the outermost ______________________
_____________________)
2. Electrons on outermost energy level are _________________________ electrons and are
involved with forming ___________________________.
3. Metals tend to __________________________ outermost electrons when combined chemically.
4. Because they tend to _____________________ electrons, most metals will react chemically with
_______________________.
__________________________: the gradual wearing away of metal due to a chemical reaction.
Nonmetals
Nonmetals are located to the _____________________ of the zigzag line in the periodic table.
Physical Properties of Nonmetals:
1.
2.
3.
4.
5.
No ______________________ / ___________________________ in appearance.
Do not conduct ____________________________ and ______________________________ well.
Are _____________________________ and ____________________________ easily.
Are neither ____________________________ nor _________________________________.
Usually have lower ____________________________ and ________________________ melting
points than metals.
6. Can be noticeably ____________________________ different from one another.
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