SCIENCE 1206 – UNIT 2 CHEMISTRY. UNIT OUTLINE CHEMISTRY TERMINOLOGY ◦ GENERAL TERMS ◦ PERIODIC...
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Transcript of SCIENCE 1206 – UNIT 2 CHEMISTRY. UNIT OUTLINE CHEMISTRY TERMINOLOGY ◦ GENERAL TERMS ◦ PERIODIC...
![Page 1: SCIENCE 1206 – UNIT 2 CHEMISTRY. UNIT OUTLINE CHEMISTRY TERMINOLOGY ◦ GENERAL TERMS ◦ PERIODIC TABLE BOHR DIAGRAMS ATOMS versus IONS NAMING COMPOUNDS.](https://reader030.fdocuments.us/reader030/viewer/2022032803/56649e2d5503460f94b1c40b/html5/thumbnails/1.jpg)
SCIENCE 1206 – UNIT 2CHEMISTRY
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UNIT OUTLINECHEMISTRY TERMINOLOGY
◦GENERAL TERMS◦PERIODIC TABLE
BOHR DIAGRAMS
ATOMS versus IONS
NAMING COMPOUNDS◦ IONIC, MOLECULAR, ACIDS
CHEMICAL REACTIONS◦BALANCING CHEMICAL EQUATIONS◦5 TYPES of REACTIONS
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IMPORTANT TO KNOW . . . You will get a PERIODIC TABLE!!!
It is your best friend for this unit!
You will need it each and every day.
Take care of it, cherish it, appreciate it!
In other words, do not leave it in a crumpled mess at the base of your locker or bookbag
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CHEMISTRY TERMINOLOGYMATTER
◦DEFINITION: Anything that has mass and volume (takes
up space).
◦What is not matter? Energy
◦In chemistry, we often discuss microscopic matter, such as atoms, ions, elements, and compounds.
MASS◦The amount of matter an object contains, measured in grams, g.
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3 STATES OF MATTERSOLID
◦ Definite volume and shape
LIQUID◦ Definite volume,
indefinite shape
GAS◦ Indefinite volume,
indefinite shape
Chemistry Subscripts◦ (s) - solid◦ (l) - liquid◦ (g) - gas◦ (aq) – aqueous,
dissolved in water
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WHAT IS CHEMISTRY? DEFINITION:
◦The study of the properties and chemical changes/reactions of matter.
So, chemistry matters
Examples of chemical reactions:◦Rusting◦Burning/Combustion
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TWO TYPES OF CHEMISTRY
PURE CHEMISTRY◦Theoretical work that involves DESCRIBING known substances and DISCOVERING new compounds for research purposes.
APPLIED CHEMISTRY◦Practical work that involves searching for USES for known substances.
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PHYSICAL PROPERTYA QUALITY or CHARACTERISTIC of a
substance that can be observed WITHOUT a chemical reaction.
Examples of Physical Properties◦ State of matter◦ Hardness◦ Colour◦ Malleability◦ Ductility◦ Odor◦ Solubility◦ Brittleness◦ Conductivity◦ Melting Point and Boiling Point
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PHYSICAL CHANGEA change in state of matter of a
substance.
Examples of Physical Changes:◦Melting/fusion – SOLID to LIQUID◦Freezing – LIQUID to SOLID◦Evaporation – LIQUID to GAS◦Condensation – GAS to LIQUID◦Sublimation – SOLID to GAS◦Deposition – GAS to SOLID
Ex: H2O(s) H2O(l)
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CHEMICAL PROPERTYA BEHAVIOUR of a substance that can
only be observed when a CHEMICAL CHANGE is taking place.
Example:◦Magnesium ribbon burning◦2 Mg(s) + O2(g) 2 MgO(s) + light energy
◦The chemical property is that light is given off when magnesium is burned.
CHEMICAL CHANGEA change in which ONE OR MORE NEW
SUBSTANCES is formed.Example:
◦ Iron Rusting4 Fe(s) + 3 O2(g) 2 Fe2O3(s)
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INDICATORS OF A CHEMICAL CHANGE
Basically, a chemical change has occurred if the change is DIFFICULT TO REVERSE.
However, there are many good indicators of a chemical change.
Observe the following pictures, and take a guess at what is happening to indicate a CHEMICAL CHANGE.
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CHEMICAL CHANGE INDICATORS
COLOUR CHANGE
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CHEMICAL CHANGE INDICATORS
BUBBLES OF GAS
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CHEMICAL CHANGE INDICATORS
SOLID (PRECIPITATE) FORMATION
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CHEMICAL CHANGE INDICATORS
HEAT/LIGHT GIVEN OFF
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MATTER FLOW CHART-DrawMATTER
PURE SUBSTANCE
COMPOUND
ELEMENT
ATOM
MIXTURE
HOMOGENEOUS MIXTURE
(SOLUTION)
HETEROGENEOUS MIXTURE
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PURE SUBSTANCEMade up of only ONE TYPE OF ATOM
or ATOM COMBINATIONStays the same in response to a
physical changeExample:
◦O2
◦H2O
TWO TYPES:◦Element◦Compound
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TYPES OF PURE SUBSTANCESELEMENT
◦A pure substance that CANNOT be broken down into a simpler substance by a CHEMICAL CHANGE.
◦ It is made up of 1 TYPE OF ATOM.◦Element SYMBOLS are always written with the
first letter UPPERCASE and the second letter LOWERCASE.
◦Element NAMES are always written in LOWERCASE letters.
◦Examples: Na Li Ar W
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TYPES OF PURE SUBSTANCESCOMPOUND
◦A pure substance that CAN be broken down into its elements with a CHEMICAL CHANGE.
◦It is made up of two or more different elements are chemically joined together in fixed proportions.
◦Examples: NaCl C6H12O6
CH4
H2O
◦
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MIXTUREContains 2 or more pure
substancesTWO TYPES:
HOMOGENEOUS MIXTURE◦ AKA SOLUTION◦ Have only one visible phase
throughout◦ Examples:
air, apple juice, salt water
HETEROGENEOUS MIXTURE◦ Contains 2 or more visible
phases throughout◦ Examples:
Soil, soup, fruitcake
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DIATOMIC MOLECULESThere are 7 elements that are diatomic,
or found in pairs, in their natural state.These are:
◦H2,
◦O2,
◦F2,
◦Br2,
◦I2,
◦N2,
◦Cl2,
◦Also P4 and S8
Memory tool: P.S., HOFBrINCl
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REACTANTS◦Starting Materials in a chemical reaction
PRODUCTS◦New substances formed in a chemical reaction
CHEMICAL REACTION◦Reactants go to form Products◦Example:◦C(s) + O2(g) CO2(g)
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MSDS – MATERIAL SAFETY DATA SHEET