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Classifying Matter:.

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Presentation on theme: "Classifying Matter:."— Presentation transcript:

1 Classifying Matter:

2 element atom Periodic Table WHMIS HHPS SDS
OUTCOME QUESTION(S): S1-2-03 What are the symbols of the first 20 elements and other common ones? S1-0-04 What symbols and systems help people use chemicals safely at home, work, and for the environment? Vocabulary & Concepts  element atom Periodic Table WHMIS HHPS SDS

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4 all known elements in the universe!
Periodic Table of Elements contains all known elements in the universe! Define element: Pure substance that cannot be broken down into any other simpler part. Atoms: All matter is made of tiny particles – ATOMS Atoms of each element are unique Compounds are combinations of elements Atoms cannot be created or destroyed

5 You need to memorize the symbols of these elements.
An updated Periodic Table contains 118 elements, the atoms of which come together to make up EVERYTHING in the Universe.

6 1. Labels on the containers 2. Safety data sheet (SDS)
WHMIS is a government program that requires all dangerous substances to have: 1. Labels on the containers 2. Safety data sheet (SDS) Some dangerous substances can be pure elements or combinations of elements that make up “chemicals.”

7 Labels are the first alert to the user about the major hazards associated with that product:
1 Product identifier Supplier identifier  Pictogram(s) – hazard symbols Signal word Hazard statement(s) Precautionary statement(s) Supplemental label information 3 4 5 6 2

8 the hazards of the product how to use the product safely
Safety Data Sheets (SDSs) are detailed, summary documents written by the manufacturer or supplier of the product: By law, SDSs must be kept by the employer/user in an accessible location for anyone to reference the hazards of the product how to use the product safely how to recognize symptoms of exposure what to do if emergencies occur

9 WHMIS (GHS) Pictograms / Symbols

10 HHPS - Hazardous Household Product Symbols
These symbols are easy to recognize and find on a product generally used at home. HHPS pictograms are intentionally easier so individuals with NO science background will understand the hazards

11 Lab Safety Rules Ever. HELP!! RULE 6: Never work alone in a Lab.
It is safer to work in pairs, so one can always get help if it is need. Lab Safety Rules

12 GENERAL GUIDELINES Read all instructions carefully before you start an experiment. Do not use or handle anything until instructed by the teacher. Only do experiments authorized by your teacher. Keep your work area clean and tidy. NO food in the laboratory. DO NOT taste, touch or smell any chemicals. Be alert and proceed with caution at all times in the laboratory. Never work alone in the laboratory.

13 Dress properly during a laboratory activity.
Wear necessary safety equipment. DO NOT touch your face during the lab. Wash your hands with soap afterwards. Take only as much chemical as you need. Take care in measuring chemicals and clean up spills immediately. DO NOT pour ANY chemicals in the sink without instruction. NEVER use chipped, cracked, or dirty glassware. Know the location of all emergency equipment. Report any accident or injury to the teacher immediately.

14 Laboratory Hazards – WHAT DO YOU DO?
Thermal Burns - water, ice Chemical Burns - water, eye-wash, shower Laceration (cuts) - Band-Aids Fire - fire blanket, extinguisher

15 CAN YOU ANSWER THESE QUESTIONS? S1-2-03
What are the symbols of the first 20 elements and other common ones? S1-0-04 What symbols and systems help people use chemicals safely at home, work, and for the environment? Vocabulary & Concepts  element atom Periodic Table WHMIS HHPS SDS

16 CLASSIFYING MATTER: Classification

17 OUTCOME QUESTION(S): S1-2-09 Vocabulary & Concepts
How do you classify matter using the words: element, compound, atom, molecule, mixture and pure? Vocabulary & Concepts  Pure Mixture Compound Molecule Diatomic Heterogeneous Homogeneous Metalloid

18 Anything that has mass and takes up space, or volume.
Matter: Anything that has mass and takes up space, or volume.

19 Pure Every particle that makes up a substance is the SAME. Mixture Substance contains more than one kind of particle.

20 Smallest particle of an element - atom 2. Compounds
PURE Elements Simplest form matter Smallest particle of an element - atom 2. Compounds Two or more elements chemically bonded Smallest particle of an compound – molecule A bucket of gold atoms (Au) and a bucket of water molecules (H2O) are both PURE since in both cases there is only ONE type of particle

21 Element: Sodium – all pure sodium atoms Compound: Salt – all pure sodium chloride molecules It’s possible to have compounds of the same atoms: Called diatomic (two atoms) molecules Oxygen gas – O2 Hydrogen gas – H2

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23 Homogeneous (can not see the pieces)
Mixture is evenly distributed – “solution” Cannot physically separate different particles Salt and water Coke Cheese

24 Heterogeneous (can see the pieces)
Mixture is not evenly distributed Different particles can be separated physically Sand and water Pizza Bubble tea

25 Metals Most common form of matter – 75% of elements Metals demonstrate similar (but NOT identical) physical and chemical properties Non-metals 15% of elements Non-metals demonstrate properties that are the opposite of metals

26 A “staircase” on every Periodic Table separates the metals from the non-metals

27 Metalloids: Elements on the staircase – 6% of elements Exhibit properties between metal / non-metals.

28 CAN YOU ANSWER THESE QUESTIONS? S1-2-09
How do you classify matter using the words: element, compound, atom, molecule, mixture and pure? Vocabulary & Concepts  Pure Mixture Compound Molecule Diatomic Heterogeneous Homogeneous Metalloid

29 Properties of Materials
Classifying Matter: Properties of Materials and Chemical Reactions

30 OUTCOME QUESTION(S): S1-2-07 S1-2-12
What properties classify elements as metals, nonmetals or metalloids? S1-2-12 How do you identify physical or chemical change and if a chemical reaction has taken place? Vocabulary & Concepts  State/Phase Lustre Ductility Malleability Solubility Conductivity Reactivity Combustibility Toxicity Precipitate Corrosion Oxidation Law of Conservation of Matter

31 Can be qualitative or quantitative
Physical properties Trait that is observed or measured without changing the composition of matter Can be qualitative or quantitative No two substances in the Universe have the same melting or boiling point - UNIQUE State/phase – solid, liquid or gas (normally) Hardness – how easy it is to scratch or dent Viscosity – how easy it flows Melting point – unique temperature needed to change from solid into liquid Boiling point – unique temperature needed to change from liquid into gas

32 Other examples of Physical Properties:
Lustre – shiny or dull Malleability – how easy to bend or flatten (opposite – brittle) Ductility – how easy to pull into a wire Solubility – does it dissolve in water Conductivity – does it transfer heat/electricity

33 Trait describes if substance reacts chemically
Chemical properties Trait describes if substance reacts chemically Cannot be observed without changing the original material Reactivity – does it react quickly? Combustibility – does it ignite or burn? Corrosion – does it react with acids? Oxidation – does it react with air? Toxicity – does it react with the body? You have to be willing to destroy or alter the substance you are testing to find a chemical property

34 (*) – there are exceptions to these properties
Property Metal Nonmetal Metalloid Lustre Malleable Ductile State (Rm Tp) Conduct heat Conduct electricity (*) – there are exceptions to these properties shiny dull shiny* * * solid* solid / gas* solid * semi

35 Anything that changes what it “looks like” NOT “what it is”
Physical Change A change in shape or state of a substance No evidence of a new material forming - crushing, melting, boiling, cutting… H O Anything that changes what it “looks like” NOT “what it is”

36 A change in chemical properties of a substance
Chemical change A change in chemical properties of a substance **Means a new substance is formed – a chemical reaction has happened! Evidence of a chemical reaction (and chemical change): A change in colour A change in smell 3. Fizzing or bubbling (new gas being made)

37 flame re-ignites or glows brighter Hydrogen gas explodes with a “pop”
Testing for Gases Oxygen flame re-ignites or glows brighter Hydrogen gas explodes with a “pop”

38 This new solid is called a precipitate
4. A new solid forms from a mixture of liquids or the mixture goes cloudy This new solid is called a precipitate A change in energy “Energy” could be light, heat, sound – think of the most obvious change in energy reaction – an EXPLOSION!

39 Physical properties Chemical properties Test the material
Physical change Chemical change Δ colour Δ smell Δ energy Gas bubbles Precipitate State or shape NO Reaction Chemical Reaction Same substance with same properties New substance with new properties

40 Would the tree and the ash weigh the same?
1000 kg 1000 kg Would the tree and the ash weigh the same?

41 In any chemical reaction matter cannot be created or destroyed.
Law of Conservation of Matter: In any chemical reaction matter cannot be created or destroyed. Atoms will rearrange to form new compounds – with new properties, but the number and type of atoms will not change during the reaction

42 CAN YOU ANSWER THESE QUESTIONS? S1-2-07
What properties classify elements as metals, nonmetals or metalloids? S1-2-12 How do you identify physical or chemical change and if a chemical reaction has taken place? Vocabulary & Concepts  State/Phase Lustre Ductility Malleability Solubility Conductivity Reactivity Combustibility Toxicity Precipitate Corrosion Oxidation Law of Conservation of Matter


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