Download - Atoms and Elements Notes
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Atoms and Elements Notes
• What are the three parts of the atom and the charges they have?
– Proton: positive charge (+)
– Neutron: no charge (N)
– Electron: negative charge (-)
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Atoms and Elements Notes
• How do we interpret the numbers for each element on the periodic table?
• Atomic number: # of protons in an element, this is what makes an element unique
• Atomic mass: # of protons + # of neutrons
• # of protons = # of electrons
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Atoms and Elements Notes
• How can atoms vary, but still be the same element?
– Isotopes: different number of neutrons
– Ions: different number of electrons
• cations have fewer electrons (positive charge)
• anions have more electrons (negative charge)
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Atoms and Elements Notes
• What is the Bohr model?
• What are the different layers of electrons called?
• What is the Octet rule?
• a design of what the atom would look like
• A shell is the “layer” of electrons
• In order to have the shell be “full” it has the number of elements in that row on the periodic table
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Compounds and Mixtures
• What is the difference between a compound and a mixture?
• A compound is two or more elements that combine to form something new.
• A mixture is two or more elements that combine and keep their original properties.
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Chemical Bonds
• What is a chemical bond?
• the way two elements attach together
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Chemical Bonds
• What are the different types of chemical bonds?
– Ionic bonds: where one element takes electrons away from another
– Covalent bonds: where elements share electrons
– Diatomic molecule: where two of the same elements bond together