Notes
Tennessee SPI Objective:Classify common substances as elements or
compounds based on their symbols or formulas
Science
Essential LearningStudents will classify substances as elements orcompounds per their chemical symbols orchemical formulas.
Essential Question(s)How do I interpret chemical symbols and chemicalformulas to classify substances as elementsor compounds?
SPI 0807.9.3 Elements and Compounds
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Notes SPI 0807.9.3 Elements and Compounds
What Is An Element? Each individual element is a unique particle called an atom So in other words… elements are the different types of atoms An element is a pure substance that CANNOT be broken down into a simpler substance by CHEMICAL means. In other words…you CANNOT change one element into a different element with a chemical reaction
ExampleLithium is an element.
Here is one lithium atom.
3
LiLithium
6.9
Science
Examples of Elements
Notes SPI 0807.9.3 Elements and Compounds Science
H
Na
Ca
-represents one sodium atom
-represents one hydrogen atom
-represents one calcium atom
The element hydrogen
The element sodium
The element calcium
More About Elements The chemical symbols for elements always start
with one capital letter These chemical symbols can be followed by one(or more) lower case letters
Ex: B, C, N, O, F, etc
Ex: He, Li, Be, Mg, etc
Sodium and Chlorine
Carbon and Oxygen
Carbon, Hydrogen, & Oxygen
Notes SPI 0807.9.3 Elements and Compounds Science
NaCl
CO2
C6H12O6
(Sodium Chloride
(Carbon Dioxide)
(Glucose)
What Is a Compound? …consists of two or more different elements that are
chemically bonded via a chemical reaction to form a new substance.
The properties of the new substance are different from the substances that you started with.
Examples of Compounds
…note that it has more than 1 capital letter
…note that it has more than 1 capital letter
…note that it has more than 1 capital letter
Notes SPI 0807.9.3 Elements and Compounds Science
Examples of Compounds
H2O
C12H22O11
CH3COOH
Chemical formulas for compounds always contain more than one capital letter.
This is the compound called water
This is the acidic compound called vinegar
This the compound called table sugar
This is how you can tell the difference between an element and a compound… count the number of capital letters!
More About Compounds
Is this an element or a compound?Write a capital E if you think it is an elementWrite a capital C if you think it is a compound
Cs(Cesium)
Why?...is a pure substance, consists of only one type of atomHow to tell?...It only has one capital letter!
Element
Review Activity
SPI 0807.9.3 Elements and Compounds Science
F.Y.I.Used to regulate the
seconds in atomic clocks
F.Y.I.Used for creating
electricity from light in photoelectric
cells/solar panels
Is this an element or a compound?Write a capital E if you think it is an elementWrite a capital C if you think it is a compound
NaCl(Sodium Chloride)
Why?... Has 2 different types of atoms bonded together How to tell?...It has more than one capital letter!
Compound
Review Activity
SPI 0807.9.3 Elements and Compounds Science
F.Y.I.This is the substance that you sprinkle on your French Fries
F.Y.I.This compound is commonly called TABLE SALT
Is this an element or a compound?Write a capital E if you think it is an elementWrite a capital C if you think it is a compound
Fe(Iron)
Why?...is a pure substance, consists of only one type of atomHow to tell?...It only has one capital letter!
Element
Review Activity
SPI 0807.9.3 Elements and Compounds Science
F.Y.I.6000 years ago:
tools and weapons were first made out of
iron.
F.Y.I.4000 years ago:
people mixed iron & carbon to create steel.
Is this an element or a compound?Write a capital E if you think it is an elementWrite a capital C if you think it is a compound
MgCl2
(Magnesium Chloride)Why?... has 2 different types of atoms bonded together
How to tell?...It has more than one capital letter!
Compound
Review Activity
SPI 0807.9.3 Elements and Compounds Science
F.Y.I.Used for dust control on dirt roads and to reduce wind erosion
of soil.
F.Y.I.Use for de-icing roads, sidewalks, driveways
and parking lots.
Here is an example of a question you might see on a quiz or test.
Questions Science
Sample Question
SPI 0807.9.3 Elements and Compounds
Here is an example of a question you might see on a quiz or test.
Questions Science
Sample Question
SPI 0807.9.3 Elements and Compounds
Here is an example of a question you might see on a quiz or test.
Questions Science
Sample Question
SPI 0807.9.3 Elements and Compounds
Here is an example of a question you might see on a quiz or test.
Questions Science
Sample Question
SPI 0807.9.3 Elements and Compounds
Here is an example of a question you might see on a quiz or test.
Questions Science
Sample Question
SPI 0807.9.3 Elements and Compounds