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- https://chem.libretexts.org/Courses/Modesto_Junior_College/Chemistry_150_-_Bunag/Textbook_for_Chemistry_150/03%3A_Atoms_and_the_Periodic_Table/3.01%3A_Basic_Atomic_TheoryAll modern scientists accept the concept of the atom, but when the concept of the atom was first proposed about 2,500 years ago, ancient philosophers laughed at the idea. It has always been difficult ...All modern scientists accept the concept of the atom, but when the concept of the atom was first proposed about 2,500 years ago, ancient philosophers laughed at the idea. It has always been difficult to convince people of the existence of things that are too small to see. We will spend some time considering the evidence (observations) that convinced scientists of the existence of atoms.
- https://chem.libretexts.org/Courses/Madera_Community_College/MacArthur_Chemistry_3A_v_1.2/03%3A_Elements_and_Compounds/3.01%3A_Properties_of_Atoms/3.1.01%3A_Indivisible_-_The_Atomic_TheoryYou learned earlier how all matter in the universe is made out of tiny building blocks called atoms. All modern scientists accept the concept of the atom, but when the concept of the atom was first pr...You learned earlier how all matter in the universe is made out of tiny building blocks called atoms. All modern scientists accept the concept of the atom, but when the concept of the atom was first proposed about 2,500 years ago, ancient philosophers laughed at the idea. It has always been difficult to convince people of the existence of things that are too small to see. We will spend some time considering the evidence (observations) that convince scientists of the existence of atoms.
- https://chem.libretexts.org/Courses/College_of_the_Canyons/Chem_151%3A_Preparatory_General_Chemistry_OER/04%3A_Atoms_and_Elements/4.01%3A_Cutting_Aluminum_until_you_get_AtomsTake some aluminum foil. Cut it in half. Now you have two smaller pieces of aluminum foil. Cut one of the pieces in half again. Cut one of those smaller pieces in half again. Continue cutting, making ...Take some aluminum foil. Cut it in half. Now you have two smaller pieces of aluminum foil. Cut one of the pieces in half again. Cut one of those smaller pieces in half again. Continue cutting, making smaller and smaller pieces of aluminum foil.
- https://chem.libretexts.org/Courses/Chabot_College/Introduction_to_General_Organic_and_Biochemistry/04%3A_Atoms/4.01%3A_Indivisible_-_The_Atomic_TheoryYou learned earlier how all matter in the universe is made out of tiny building blocks called atoms. All modern scientists accept the concept of the atom, but when the concept of the atom was first pr...You learned earlier how all matter in the universe is made out of tiny building blocks called atoms. All modern scientists accept the concept of the atom, but when the concept of the atom was first proposed about 2,500 years ago, ancient philosophers laughed at the idea. It has always been difficult to convince people of the existence of things that are too small to see. We will spend some time considering the evidence (observations) that convince scientists of the existence of atoms.
- https://chem.libretexts.org/Courses/American_River_College/Chemistry_305_(S21_Zarzana)/Map%3A_Introductory_Chemistry_(Tro)/04%3A_Atoms_and_Elements/4.02%3A_Indivisible_-_The_Atomic_TheoryYou learned earlier how all matter in the universe is made out of tiny building blocks called atoms. All modern scientists accept the concept of the atom, but when the concept of the atom was first pr...You learned earlier how all matter in the universe is made out of tiny building blocks called atoms. All modern scientists accept the concept of the atom, but when the concept of the atom was first proposed about 2,500 years ago, ancient philosophers laughed at the idea. It has always been difficult to convince people of the existence of things that are too small to see. We will spend some time considering the evidence (observations) that convince scientists of the existence of atoms.
- https://chem.libretexts.org/Courses/San_Diego_Miramar_College/Chem_103%3A_Fundamentals_of_GOB_Chemistry_(Garces)/04%3A_Atoms_and_Elements/4.02%3A_Indivisible_-_The_Atomic_TheoryYou learned earlier how all matter in the universe is made out of tiny building blocks called atoms. All modern scientists accept the concept of the atom, but when the concept of the atom was first pr...You learned earlier how all matter in the universe is made out of tiny building blocks called atoms. All modern scientists accept the concept of the atom, but when the concept of the atom was first proposed about 2,500 years ago, ancient philosophers laughed at the idea. It has always been difficult to convince people of the existence of things that are too small to see. We will spend some time considering the evidence (observations) that convince scientists of the existence of atoms.
- https://chem.libretexts.org/Courses/Madera_Community_College/Concepts_of_Physical_Science/10%3A_Elements_Are_Made_of_Atoms/10.01%3A_Introduction_to_Atoms_and_ElementsThe word "atom" comes from the Greek ατομοσ and means "indivisible". The atomists of the time (Democritus being one of the leading atomists) believed there were t...The word "atom" comes from the Greek ατομοσ and means "indivisible". The atomists of the time (Democritus being one of the leading atomists) believed there were two realities that made up the physical world: atoms and void.
- https://chem.libretexts.org/Courses/Bellingham_Technical_College/Bellingham_Technical_College_CHEM_121/02%3A_Module_2_-_Atoms_and_Bonding/2.01%3A_Indivisible_-_The_Atomic_TheoryYou learned earlier how all matter in the universe is made out of tiny building blocks called atoms. All modern scientists accept the concept of the atom, but when the concept of the atom was first pr...You learned earlier how all matter in the universe is made out of tiny building blocks called atoms. All modern scientists accept the concept of the atom, but when the concept of the atom was first proposed about 2,500 years ago, ancient philosophers laughed at the idea. It has always been difficult to convince people of the existence of things that are too small to see. We will spend some time considering the evidence (observations) that convince scientists of the existence of atoms.
- https://chem.libretexts.org/Courses/Pasadena_City_College/Chem_2A_(Ku)_Textbook/02%3A_Atoms_and_Elements/2.03%3A_What_are_atoms/2.3.02%3A_Indivisible_-_The_Atomic_TheoryYou learned earlier how all matter in the universe is made out of tiny building blocks called atoms. All modern scientists accept the concept of the atom, but when the concept of the atom was first pr...You learned earlier how all matter in the universe is made out of tiny building blocks called atoms. All modern scientists accept the concept of the atom, but when the concept of the atom was first proposed about 2,500 years ago, ancient philosophers laughed at the idea. It has always been difficult to convince people of the existence of things that are too small to see. We will spend some time considering the evidence (observations) that convince scientists of the existence of atoms.
- https://chem.libretexts.org/Courses/American_River_College/CHEM_305%3A_Introduction_to_Chemistry_(Zumalt)/02%3A_Unit_2/2.09%3A_Indivisible_-_The_Atomic_TheoryYou learned earlier how all matter in the universe is made out of tiny building blocks called atoms. All modern scientists accept the concept of the atom, but when the concept of the atom was first pr...You learned earlier how all matter in the universe is made out of tiny building blocks called atoms. All modern scientists accept the concept of the atom, but when the concept of the atom was first proposed about 2,500 years ago, ancient philosophers laughed at the idea. It has always been difficult to convince people of the existence of things that are too small to see. We will spend some time considering the evidence (observations) that convince scientists of the existence of atoms.
- https://chem.libretexts.org/Bookshelves/Introductory_Chemistry/Introductory_Chemistry_(CK-12)/04%3A_Atomic_StructureThis page details the evolution of atomic theory from ancient Greece to modern science, contrasting Democritus's indivisible atoms with Aristotle's divisible matter. It discusses fundamental laws of c...This page details the evolution of atomic theory from ancient Greece to modern science, contrasting Democritus's indivisible atoms with Aristotle's divisible matter. It discusses fundamental laws of chemistry, like conservation of mass, and pivotal experiments such as Rutherford's gold foil and J.J. Thomson's cathode ray tube that reveal atomic structure.
