CHEM 210- Final Exam Guide - Comprehensive Notes for the exam ( 30 pages long!)

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30 Nov 2017
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CHEM 210
FINAL EXAM
STUDY GUIDE
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General Chemistry Chapter 1 Notes
An Element is a substance that cannot be broken down to any other substance. An element is
the most basic unit of a substance.
One or two letters are
used to signify an element on the
periodic table show  on the left.
● In 1864, John Newlands noticed that when the atoms were arranged by Atomic
Relative Mass, the mass of an atom of a chemical element expressed in atomic mass
units (It is approximately equivalent to the number of protons and neutrons in the atom),
each element was similar to the element eight places forward known as The law of
octaves.
Mendeleev (shown right) grouped 66 elements according to their properties.
He also arranged them in order of their relative mass. He also predicted
properties for elements not yet discovered, and left room for them on his
periodic table.
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● The modern periodic table is arranged in groups based on the properties of the elements
○ Property- Any characteristic used to identify an element
○ Intensive Properties- Do
not
depend on amount of sample
Temperature
■ Melting Point
○ Extensive Properties- Do

depend on sample size
Length
Volume
○ Physical Properties- Do
not

involve change in sample’s chemical makeup
○ Chemical Properties- Do

involve a change in sample’s chemical makeup
Physical Properties
Chemical Properties
Temperature
Color
Melting point
Electrical Conductivity
Odor
Amount
Solubility
Rusting (of iron)
Combustion (of gasoline)
Tarnishing (of silver)
Hardening (of cement)
How the Periodic Table of the Elements is arranged
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Document Summary

An the most basic unit of a substance. In 1864, john newlands noticed that when the atoms were arranged by . Relative mass , units (it is approximately equivalent to the number of protons and neutrons in the atom), each element was similar to the element eight places forward known as octaves. Mendeleev (shown right) grouped 66 elements according to their properties. He also arranged them in order of their relative mass. he also predicted properties for elements not yet discovered, and left room for them on his periodic table. The modern periodic table is arranged in groups based on the properties of the elements. High densities and melting points compared to alkali metals. All metals except mercury are solid at room temperature. (br) is a liquid, and five are solid at room temperature. Seven elements along the zigzag boundary between metals and nonmetals. Called semiconductors because they can be modified to function as conductors.

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