Transcript Is this an element or a compound?

Bell
Work
SPI 0807.9.9
Periodic Table
Nov 17, 2014
A) Number your paper from one to five, and open your book to
pages 286-287.
B) Write down the five chemical symbols shown below.
C) Then locate each of these elements on the periodic table by
using the element's atomic number.
D) Next write the correct name for each element next to the
chemical symbol. Note: Use pages 286-287 to help you
(1) Na (atomic number is 11)
(2) N (atomic number is 7)
(3) Cl (atomic number is 17)
(4) K (atomic number is 19)
(5) Ca (atomic number is 20)
3
Atomic
Number
Li
Lithium
6.9
Bell
Work
SPI 0807.9.9
Periodic Table
Science
Answers
(1) Na (atomic number is 11)
Sodium
(2) N (atomic number is 7)
Nitrogen
(3) Cl (atomic number is 17)
Chlorine
(4) K (atomic number is 19)
Potassium
(5) Ca (atomic number is 20)
Calcium

Humor

 Silly Thought 13 
I took a course in speed waiting…
…Now I can wait an hour in only ten
minutes
Notes
SPI 0807.9.3
Elements and Compounds

What Is An Element?
 a 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
 Each individual element is a unique particle called an atom
 So in other words… elements are the different types of atoms
Example:
Lithium is an
element.
Here is one
lithium atom
3
Li
Lithium
6.9
Notes
SPI 0807.9.3
Elements and Compounds

More About Elements:
 Elements’ chemical symbols always start with one
capital letter
 Can be followed by one or more lower case letters
Examples of Elements:
H = the element hydrogen
 represents one hydrogen atom
Na = the element sodium
 represents one sodium atom
Uub=the element ununbium
 represents one ununbium atom
Notes
SPI 0807.9.3
Elements and Compounds

What Is a Compound?
 …is a substance made up of atoms 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.
 COMPOUND EXAMPLES:
NaCl = (Table Salt)
SODIUM AND CHLORINE
CO2 = (Carbon dioxide)
CARBON AND OXYGEN
C6H12O6 = (Glucose) CARBON, HYDROGEN, & OXYGEN
Notes
SPI 0807.9.3
Elements and Compounds

More About Compounds:
 Formulas for compounds will always contain more than
one capital letter.
 This is how you can tell the difference between an element
and a compound… count the number of capital letters!
Examples:
…is a compound for it has more than 1 capital letter
H2O
 This is the compound called water
C12H22O11
…is a compound for it has more than 1 capital letter
 This the compound called table sugar
CH3COOH
…is a compound for it has more than 1 capital letter
 This is the acidic compound called vinegar
.
Break
Time!
SPI 0807.9.9
Periodic Table
Break
Time!
Stand and Stretch!
 You have been sitting for a mighty long time.
 Let's take a 1 minute break to stand and stretch.
Review Activity

Is this an element or a compound?
Write a capital E if you think it is an element
Write a capital C if you think it is a compound
Cs
Element
(Cesium)
Why?...is a pure substance, consists of only one type of atom
How to tell?...It only has one capital letter!
Review Activity

Is this an element or a compound?
Write a capital E if you think it is an element
Write a capital C if you think it is a compound
NaCl
Compound
(Sodium Chloride)
Why?... has two atoms chemically bonded together
How to tell?...It has more than one capital letter!
Review Activity

Is this an element or a compound?
Write a capital E if you think it is an element
Write a capital C if you think it is a compound
Fe
Element
(Iron)
Why?...is a pure substance, consists of only one type of atom
How to tell?...It only has one capital letter!
Review Activity

Is this an element or a compound?
Write a capital E if you think it is an element
Write a capital C if you think it is a compound
MgCl2
Compound
(Magnesium Chloride)
Why?... has two atoms chemically bonded together
How to tell?...It has more than one capital letter!