What is Matter?. EVERYTHING!!! Matter is anything that has mass and volume. Mass Volume The amount...
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Transcript of What is Matter?. EVERYTHING!!! Matter is anything that has mass and volume. Mass Volume The amount...
![Page 1: What is Matter?. EVERYTHING!!! Matter is anything that has mass and volume. Mass Volume The amount of matter in a substance. The amount of space a substance.](https://reader033.fdocuments.in/reader033/viewer/2022061602/56649f335503460f94c4f145/html5/thumbnails/1.jpg)
What is Matter?
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EVERYTHING!!!
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Matter is anything that has mass and volume.
• Mass
• Volume
The amount of matter in a substance.
The amount of space a substance occupies.
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AtomsAtoms• Atoms are the Atoms are the
basic building basic building blocks of all blocks of all matter.matter.
• The smallest The smallest particle of matter.particle of matter.
• Like the bricks in Like the bricks in a house.a house.
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Parts of an Atom•An atom’s parts make it different from other atoms.
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The Nucleus•At the center of an atom•Made up of two kinds of
particles–Protons–Neutrons
NUCL
EUS
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Protons & Neutrons
• Each have a mass of about 1 atomic mass unit (amu)
• Protons– Carry a positive (+) charge
• Neutrons– Have no charge (neutral)
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Electrons• Move around in an
area outside the nucleus called the electron cloud
• Carry a negative (-) charge
• Have an insignificant mass compared to protons and neutrons
Electrons
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NEUTRONS
PR
OTO
NS
ELECTRONS
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Elements•Each kind of atom is an element.
•An element is a pure substance that cannot be broken down into simpler substances.
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• 117 confirmed elements
• 90 found in nature–Ex: carbon, oxygen, gold, silver, iron
• Other 27 are man-made
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Remember: The properties of an element are determined by
the structure of its atoms.• The main feature used to distinguish
the atoms of different kinds of elements is atomic number.– Atomic Number: the # of PROTONS in
the nucleus of an atom.– It’s unique for each element.
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A more in depth look at an atom:
• Does a carbon atom have a positive or negative charge?– Hint: look at the # of subatomic particles.
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Atomic Mass
• Protons + Neutrons = Atomic Mass– The mass of a proton is 1 amu– The mass of a neutron is 1 amu– Electrons contribute no mass to an atom.
Proton1 amu Neutron
1 amu
ElectronNo mass
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Try a few…
Element ProtonsNeutron
sElectrons
Atomic Mass
Carbon (C)
6 6 6
Oxygen (O)
8 8 8
Sodium (Na)
11 11 11
Potassium (K)
19 20 19
Iron (Fe) 26 29 26
12 amu
16 amu
22 amu
39 amu
55 amu
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Chemical Symbols
• A code, usually one or two letters, that is used to represent a particular element.– Ex. – C=Carbon,
Ca=Calcium, Fe=Iron, etc.
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Types of Matter
–Elements–Compounds–Mixtures
•All forms of matter can be classified into three groups based on how the atoms making up the matter are arranged.
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Mixtures• When two or more substances
combine without joining together chemically– The mixture’s parts retain their identity
• Heterogeneous – mixed unevenly• Homogeneous – mixed evenly• Mixtures can be separated more
easily then compounds• Examples?
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Pure Substances•Elements and
Compounds– Have a
homogeneous composition•It’s properties and chemical makeup are the same throughout the sample
– Cannot be separated by physical means into the parts that make it up.
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Compound•Form when two or more elements join chemically.–Join by sharing electrons
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Example of a Compound• Table Salt
– Made up of Sodium (Na) and Chlorine (Cl)• Na – soft metal that explodes when
combined with water• Cl – poisonous gas
– Combine to form the edible, white solid: SALT!
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When elements
combine to form
compounds, they DO
NOT keep their
individual properties.
If they did, we
wouldn’t be able to eat salt!
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MATTER
Pure Substances
Mixtures
HeterogeneousMixtures
HomogeneousMixtures
Elements Compounds
Made of onetype of atom
Made of more thanone type of atom
exists as
which include which include
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Molecules• The smallest unit of a compound
that has all the properties of the compound.
• Chemical Formula – uses chemical symbols and subscripts to identify the number and types of atoms of each element that make up a molecule of a compound.
Oxygen
Hydrogen Hydrogen
H2O
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More with H2O• Chemical Symbol
for Hydrogen
• Chemical Symbol for Oxygen
• What do you think the “2” means?
The # of atoms of that element in the substance
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Subscript• Written to the right and slightly
below a chemical symbol to tell the number of atoms of that element in a substance.
• Water – H2O– Two molecules of Hydrogen– One molecule of Oxygen
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You Try!Common Name
Formula How Many?
Dry Ice CO2 C- O-
Table Salt NaCl Na- Cl-
Fool’s Gold FeS2 Fe- S-
Cane Sugar C12H22O11 C- H- O-
Rust (Fe2O3)H2O Fe- O- H-
Asprin CH3CO2C6H4COOH C- H- O-
1 2
1 1
1 2
12 22 11
2 4 2
9 8 4