6.1- atoms, elements, and compounds · 2019. 8. 7. · 6.1- atoms, elements, and compounds (day 1)...
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6.1-Atoms,Elements,andCompounds
(Day1)
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Matter is anything that has mass and takes up space.!
Everything in the universe is either matter or energy.!!
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Atoms are the basic unit of matter.!They are the building blocks of all matter (everything).!!Remember- cells are the basic unit of LIFE!!
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Atoms are made up of smaller pieces called subatomic particles in the nucleus: Protons (positive) p+!
Neutrons (neutral) n0
Orbit around the nucleus Electrons (negative) e-
!!It takes about 1,800 electrons to equal the mass of one neutron
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A molecule is a group of atoms bonded together.!
Ex: Oxygen Water! O2 H2O !
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An element is a pure substance that cannot be broken down into other substances.!!
Ex: Oxygen, Carbon!O C !
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Each element has a unique name and symbol. !
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The periodic table of elements!!
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CHNOPSMost common elements:
carbon hydrogen nitrogen oxygen phosphorussulfur
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A compound is two or more elements chemically combined!
Ex: Water H2O!Carbon Dioxide CO2!
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Compounds are formed from elements in a fixed ratio.!
O2 Oxygen H2O Water!O3 Ozone H2O2 Hydrogen Peroxide!
!
Compounds can be broken down into their elements.!
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A mixture is two or more molecules that are NOT chemically combined.!
Ex: air!
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(Atoms)
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AtomsorMolecules?Element,Compound,Mixture?
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AtomsorMolecules?Element,Compound,Mixture?
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AtomsorMolecules?Element,Compound,Mixture?
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AtomsorMolecules?Element,Compound,Mixture?
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AtomsorMolecules?Element,Compound,Mixture?