Element and Compound Reassessment Review Directions: •Click “Slideshow” then “From Beginning” to view this show properly. •As you go through take detailed note on each page. •Be sure to use the page titles for your sub heading to keep you note organized. •Then go back and study the information.
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Element and Compound Reassessment Review
Directions:•Click “Slideshow” then “From Beginning” to view this show properly.•As you go through take detailed note on each page.•Be sure to use the page titles for your sub heading to keep you note organized.•Then go back and study the information.•Write down any questions or things you do not understand.
An element is a substance that is made from one kind of atom only. It cannot be broken down into
simpler substances.
An element
An element
atom atom
Elements
Element SymbolsElements are PURE SUBSANCES made of only one type of atom.
So chemists do not have to write out the whole name of an element, they are represented by symbols of one or two letters.
*An element symbol only contains one capital letter but may also have a lower case letter.!
Elements make up Compounds
The elements, alone or in combinations, make up our bodies, our world, our sun, and in fact, the entire universe.
CompoundsWhen elements chemically combine to make different substance it is called a compound.Compounds are made of two or more elements joined.Compound formulas are written by combining the element symbols together.
A compound is a substance that is made from more than one element.
atom atom
A compound made up of 2 different elements
A compound made up of 7 different elements
Compounds
A compound can be broken down into the elements that make it up.
A compound made up of 3 different elements
An element
An element
An element
Compounds
PRACTICE!On the next slide is a
COMPOUND or ELEMENT practice chart.
Read the information given in a row and decide whether it is an element or a compound.
Click to check your answer.
Material Made up of: Element or compound
Water Hydrogen and Oxygen
Coal Carbon
Carbon dioxide
Carbon and Oxygen
Oxygen Oxygen
Chalk Calcium, Carbon & Oxygen
Wax Carbon & Hydrogen
Table salt Sodium & Chlorine
Helium Helium
Compound
Compound
Compound
Compound
Compound
Element
Element
Element
11
PRACTICE READING COMPOUNDS!Read the compound formula and see if you can figure out HOW MANY
ELEMENTS are in it and WHICH ELEMENTS they are. Click to check your answer.
NaHCO₃
NaCl
C₆H₉O₆
4 – sodium, hydrogen, carbon, oxygen
2 – sodium, chlorine
3 – carbon, hydrogen, oxygen
Elements in our Earth
Looking this image, you can see although there are 118 know elements on our planet the majority of solid earth is made up of just a handful of those elements.
Elements in our Earth
Humans are mostly Oxygen and __________ which is the basis or all living things
Carbon
Elements in our Earth
Earth’s crust is also mostly Oxygen but it also has a lot __________Silicon
Elements in our Earth
Did you know the air we breath is NOT mostly oxygen???It does have a lot of Oxygen but is mostly made of _________.Nitrogen
Elements in our EarthSo you see, out of all the elements we know exist, the bulk of
our planet and all the living things on it are made mostly of just a handful of those elements.
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