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The Nature of MatterIntro to Chemistry(Matter & energy)
What is Chemistry?
Chemistry is the study of the ___________ and __________ of ______ and the ________ it undergoes.
composition propertiesmatter changes
Matter is all of the stuff around
you!
What’s Matter?Matter is anything that has _____ and takes up ______
massSpace (has volume!)
Mass is the amount of ______ that a substance possesses.
matter
Weight is the effect of _______ on that mass.
gravity
Mass vs. WeightSay you weigh ____ pounds on Earth and you travel to the moon.
150
You will only weigh ___ pounds, because the moon has ____ the ________.
251/6
Your _______ changes, but you still have the same _____ and take up the same amount of ______.
weightmass
space
gravity
Types of MatterMatter is made of either ______________ or ________.pure substances mixtures
A pure substance is made of only ____ type of particle that cannot be separated easily.
one
A mixture is made of _____ or _____ types of particles that can be easily separated.
two more
Heterogeneous Mixture
Matter
Can it be physically separated?
NOYES
Mixture
Can it be chemically
decomposed?
Pure Substance
Is the composition
uniform?
Yes No
Homogeneous Mixture
Yes No
Compound Element
Pure SubstancesA pure substance can be ___________ into smaller and smaller particles – but every piece still has the same _________ as the whole.
subdivided
properties
A pure substance that is made of only one type of ______ is called an _______.
atomelement
Pure Substances
–contain only ONE kind of atom– #1-93 occur naturally, the rest are synthetic (#94-118)
–Ex - copper gold
ELEMENTS ELEMENTS
Atoms & ElementsAtoms are considered the ________ blocks of all ______, and cannot be _________ or __________.
buildingmatter
created destroyed
There are approximately ____ different types of atoms, each with its own unique ___________.
109
Composition (#p, #e, #n)
If two or more atoms are ________ together, this substance is called a _________. (It’s still a “pure substance”)
joined
compound
Pure Substances• COMPOUND• composed of 2 or more
elements in a fixed ratio–New properties different from individual elements
The compound has completely different properties than the element!
NaClNa
Cl2
Compounds
moleculecompound
Compounds are made by forming chemical ______ between ______.bonds atoms
The smallest naturally-occurring unit of a __________ is called a ________.If substances are combined but they do ____ form chemical ______, the substance is called a _________. (it is no longer a “pure substance”)
NOT bondsMIXTURE
**A Chemical Bond occurs when Atoms Transfer or Share Valence Electrons**
MIXTURESMIXTURES
• Made of two or more separate compounds and or elements in variable amounts
• Weak or Strong Kool –Aid is still Kool-Aid but I can’t have weak or strong Water
• Homogeneous Heterogeneous
Solutions
Matter Flow Chart
A mixture that has the same ___________ throughout the substance is called a _____________ mixture.composition
homogeneous
Examples of homogeneous mixtures:
salt waterair
vanilla puddingGatorade
MixturesA mixture that does not have the same ___________ throughout the substance is called a _____________ mixture. You can usually see the components of this mixture!
compositionheterogeneous
Examples of heterogeneous mixtures:
soil
Rocky Road ice cream
fruit saladmixed nuts
Which is it?
ElementCompoundMixture
Flowchart of Matter
Matter
MixturePure
Substance
Homo-geneous
Hetero-geneous
Compound Element
Properties of Matter___________ properties are those characteristics that can be _________ using our senses without changing the _______ of the substance.
Physicalobserved
Common physical properties include:color
odordensityphysical state
melting point
boiling point
identity
mass
Properties of Matter________ properties describe a substance’s ability to undergo _________ in ________. They become something entirely new!!!
Chemical
changes identity
Examples:_____ reacts with ____ and _____ to form ____Iron air water
Rust (also known as Iron Oxide)
______, ____ and _____ become _____ in the presence of _____.Flour egg sugarcake heat
Changes in MatterThe changes that matter undergoes can be classified as either ________ or _________ changes.
physicalchemical
Physical changes alter the _________ properties of the substance, but not its basic ___________. (still the same stuff!)
physical
composition
*A physical change: changes what you ______ like, but not ____ you ____.look who are
Physical vs. Chemical Physical Change -
changes the form of a substance without changing its identity
properties remain the same
Examplesdissolving, changes of phase
(solid, liquid, or gas) ie: melting, boiling, freezing!)
Changes in MatterA chemical change alters the __________ and _________ of a substance.composition structure
Chemical changes are always accompanied by changes in _______.energy
*A chemical change: changes ____________ about you!everything
The __________ of a chemical change have _________ properties!
productsdifferent
Physical vs. ChemicalChemical Change -
changes the identity of a substance
products have different properties
ID by color change, bubbles, heat change, precipitate
Examples rust, burning paper, ice pack
Chemical Changes
• Signs of a Chemical Change change in color or odor
formation of a gas formation of a precipitate (solid) change in light or heat
Chemical Changes - Physical vs. Chemical
Physical vs. Chemical
• Examples:
–rusting iron
–dissolving in water
–burning a log
–melting ice
–grinding spices
chemical
physical
chemical
physical
physical
Physical vs. Chemical
Physical
Chemical
Qualitative vs. Quantitative
• Qualitative analysis deals with the _________ of a substance:qualities
colorodor
State of matter
** These can be _________ without regard for the ________ of the substance.
observedamount
Qualitative vs. Quantitative
• Quantitative analysis deals with __________ the substance.measuring
THINK!!! Quantitative = QUANTITY
temperaturemass
volume