atoms smallest possible unit into which matter can be divided, while still maintaining its...
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![Page 1: Atoms Smallest possible unit into which matter can be divided, while still maintaining its properties. Made up of: – protons – neutrons – electrons For](https://reader035.vdocuments.site/reader035/viewer/2022062320/56649f465503460f94c68b66/html5/thumbnails/1.jpg)
Atoms
• Smallest possible unit into which matter can be divided, while still maintaining its properties.
• Made up of:– protons– neutrons– electrons
For example, what is the smallest possible unit
into which a long essay can be divided and still have some meaning?
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-++ +
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- -+
Complete Atomic Structure Graphic Organizer
![Page 2: Atoms Smallest possible unit into which matter can be divided, while still maintaining its properties. Made up of: – protons – neutrons – electrons For](https://reader035.vdocuments.site/reader035/viewer/2022062320/56649f465503460f94c68b66/html5/thumbnails/2.jpg)
Protons (+)
• Positively charged particles
• Help make up the nucleus of the atom
• Help identify the atom (could be considered an atom’s DNA)
• Equal to the atomic number of the atom
• Contribute to the atomic mass
• Equal to the number of electrons
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Complete Atomic Structure Graphic Organizer
![Page 3: Atoms Smallest possible unit into which matter can be divided, while still maintaining its properties. Made up of: – protons – neutrons – electrons For](https://reader035.vdocuments.site/reader035/viewer/2022062320/56649f465503460f94c68b66/html5/thumbnails/3.jpg)
Neutrons
• Neutral particles; have no electric charge
• Help make up the nucleus of the atom
• Contribute to the atomic mass
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Complete Atomic Structure Graphic Organizer
![Page 4: Atoms Smallest possible unit into which matter can be divided, while still maintaining its properties. Made up of: – protons – neutrons – electrons For](https://reader035.vdocuments.site/reader035/viewer/2022062320/56649f465503460f94c68b66/html5/thumbnails/4.jpg)
Electrons (-)• Negatively charged
particles• Found outside the nucleus
in shells ( 1st = 2, 2nd = 8, 3rd = 8 or 18, etc…)
• Smaller than protons and neutrons
• Equal to the number of protons
• Involved chemical bonding of other atoms
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Complete Atomic Structure Graphic Organizer
![Page 5: Atoms Smallest possible unit into which matter can be divided, while still maintaining its properties. Made up of: – protons – neutrons – electrons For](https://reader035.vdocuments.site/reader035/viewer/2022062320/56649f465503460f94c68b66/html5/thumbnails/5.jpg)
Hydrogen (H) Atom
• Notice the one electron in the first orbital
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Even though there are no neutrons present, Hydrogen is still considered an atom
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= 1
= 0
= 1
How manymore
electronscan fit in the 1st orbital/ level?
Complete Atomic Structure Graphic Organizer
![Page 6: Atoms Smallest possible unit into which matter can be divided, while still maintaining its properties. Made up of: – protons – neutrons – electrons For](https://reader035.vdocuments.site/reader035/viewer/2022062320/56649f465503460f94c68b66/html5/thumbnails/6.jpg)
Oxygen (O) Atom
• Notice the two electrons in the first orbital/level and the six in the second
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= 8
= 8
= 8
How manymore
electronscan fit in the 2nd orbital/ level?
Complete Atomic Structure Graphic Organizer
![Page 7: Atoms Smallest possible unit into which matter can be divided, while still maintaining its properties. Made up of: – protons – neutrons – electrons For](https://reader035.vdocuments.site/reader035/viewer/2022062320/56649f465503460f94c68b66/html5/thumbnails/7.jpg)
Sodium (Na) Atom• Notice the two electrons in the first orbital/level,
eight in the second, and one in the third
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-+
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= 11
= 12
= 11
How manymore
electronscan fit in the 3rd orbital/ level?
Complete Atomic Structure Graphic Organizer
![Page 8: Atoms Smallest possible unit into which matter can be divided, while still maintaining its properties. Made up of: – protons – neutrons – electrons For](https://reader035.vdocuments.site/reader035/viewer/2022062320/56649f465503460f94c68b66/html5/thumbnails/8.jpg)
The Atom’s “Center”
• Protons and neutrons are grouped together to form the “center” or nucleus of an atom.
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Notice that the electrons are not apart of the nucleus
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Complete Atomic Structure Graphic Organizer
![Page 9: Atoms Smallest possible unit into which matter can be divided, while still maintaining its properties. Made up of: – protons – neutrons – electrons For](https://reader035.vdocuments.site/reader035/viewer/2022062320/56649f465503460f94c68b66/html5/thumbnails/9.jpg)
Atomic Number
• The number of protons in the nucleus of an atom
+ ++ --
-What would be
the atomic number of this
atom?
Complete Atomic Structure Graphic Organizer
![Page 10: Atoms Smallest possible unit into which matter can be divided, while still maintaining its properties. Made up of: – protons – neutrons – electrons For](https://reader035.vdocuments.site/reader035/viewer/2022062320/56649f465503460f94c68b66/html5/thumbnails/10.jpg)
Mass Number
• The total number of protons and neutrons in an atom’s nucleus
• Expressed in Atomic Mass Units (amu)– Each proton or neutron has a mass of 1 amu
+ ++ -
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-What would be the
mass number of this atom?
+ 3
4
3 protons + 4 neutrons = a mass number of 7
amu
Why did we not account for the electrons when calculating
the mass number?
Complete Atomic Structure Graphic Organizer
![Page 11: Atoms Smallest possible unit into which matter can be divided, while still maintaining its properties. Made up of: – protons – neutrons – electrons For](https://reader035.vdocuments.site/reader035/viewer/2022062320/56649f465503460f94c68b66/html5/thumbnails/11.jpg)
Atomic number equals the number of ____________ or ________________.
Atomic mass equals the number of ______________ + _______________.
The Atoms Family - Atomic Math Challenge
Atomic NumberSymbolNameAtomic Mass
protonselectrons protons
neutrons
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Assignment: Finish the rest of the worksheet. Come up front when finished for a stamp!
20 Minutes
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