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Developmen
tof the AtomPrepared By: Jerome A. Bigael, Leyte Progressive High School
Thales of Miletus
(ca. 624-546 BCE) was
the first to ask and
propose an answer to
the question:
What is matter
composed of...
Empedocles of Agrigentum
(492-432 BCE) considered air, water,
earth and fire as the four essential
elements that could pos...
Later on, Leucippus (5th century
BCE) and his student Democritus
(460-370 BCE) introduced the first
atomic theory by raisi...
Leucippus concluded that at
some point, one would arrive at
fragments that can no longer be
divided. Yet, those indivisibl...
Leucippus is considered as
the first atomist but is less
well known compared to
Democritus who expanded
Leucippu’s atomic ...
Democritus , dubbed as the
father of atomism, considered
atoms to be solid and
indestructible.
Thought that the universe h...
Refers to the
philosophy that
states that all
matter was
produced from
atoms.
Atomism
He rejected the
idea of
Atomism.
Aristotle (384-322)
Aristotole assumed that only the
observable things could be proven
true. Since atoms are not visible to
the naked eye, the...
He believed that
water, air, fire, and
earth were the
fundamental
elements while hot,
cold, dry, wet were
the four propert...
Aristotle also added “ether” as another
fundamental substance.
He believed that ether constitute the
stars, including the ...
Belief lasted until the Middle Ages (AD
500-1450) along with the falling out of
support for atomism.
Philosophers that hol...
Unfortunately, the writings were
forgotten after he died and only one
copy of the poem lasted centuries
after.
Ancient Gre...
A substance can be
changed into another
substance. This idea
of changing
substances intitiated
alchemy.
People who practic...
Alchemist learned numerous chemical
substances.
They had shown how certain types of
chemicals react when combined with
oth...
Alchemist were mainly skillful with
metals, creating cheaper imitations of
gold and silver.
Through time, alchemist eventu...
•Alchemical process lead to the
discovery of caustic alkalis such as
sodium hydroxide (NaOH) and
ammonium salts.
•The proc...
During the renaissance, one of the most
forceful men of that time, Paracelsus (1493-
1541) founded the school of iatrochem...
He also coined the term “alcohol”
to spirits of wine.
By late 18th century, traditional
alchemy was fully separated from
c...
•In a sheet of paper, write a short
essay on how the ancient
discoveries in science been useful
today.
(Provide real examp...
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Development of the atom

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Physical Science Grade 11 or 12 ABM Strand K-12 Senior High School (Curriculum Guided)

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Development of the atom

  1. 1. Developmen tof the AtomPrepared By: Jerome A. Bigael, Leyte Progressive High School
  2. 2. Thales of Miletus (ca. 624-546 BCE) was the first to ask and propose an answer to the question: What is matter composed off? Ancient Gr reeksG Thales thought of water (H2O) as the ultimate substance that constituted matter because he believed that water could change into any kind of matter.
  3. 3. Empedocles of Agrigentum (492-432 BCE) considered air, water, earth and fire as the four essential elements that could possibly be the source of everything- all kinds of matter.
  4. 4. Later on, Leucippus (5th century BCE) and his student Democritus (460-370 BCE) introduced the first atomic theory by raising questions on whether or not a substance could be divided continuously.
  5. 5. Leucippus concluded that at some point, one would arrive at fragments that can no longer be divided. Yet, those indivisible fragments would still maintain the characteristics of the original material.
  6. 6. Leucippus is considered as the first atomist but is less well known compared to Democritus who expanded Leucippu’s atomic hypothesis.
  7. 7. Democritus , dubbed as the father of atomism, considered atoms to be solid and indestructible. Thought that the universe has merely atoms and empty space, which he called the Void
  8. 8. Refers to the philosophy that states that all matter was produced from atoms. Atomism
  9. 9. He rejected the idea of Atomism. Aristotle (384-322)
  10. 10. Aristotole assumed that only the observable things could be proven true. Since atoms are not visible to the naked eye, their presence could not be confirmed by observation.
  11. 11. He believed that water, air, fire, and earth were the fundamental elements while hot, cold, dry, wet were the four properties combined to produce these fundamental elements.
  12. 12. Aristotle also added “ether” as another fundamental substance. He believed that ether constitute the stars, including the sun. Aristotle also believed that the seeming empty space is filled with ether.
  13. 13. Belief lasted until the Middle Ages (AD 500-1450) along with the falling out of support for atomism. Philosophers that hold on to atomism were Epicurus and his follower, Lucretius. Lucretius wrote a poem entitled “On the Nature of Things” wherein he reaffirmed the basic components of atomism.
  14. 14. Unfortunately, the writings were forgotten after he died and only one copy of the poem lasted centuries after. Ancient Greek philosophers tried to answer questions about the composition of matter simply by logic and reasoning.
  15. 15. A substance can be changed into another substance. This idea of changing substances intitiated alchemy. People who practice alchemy were called alchemist. A lchemyA
  16. 16. Alchemist learned numerous chemical substances. They had shown how certain types of chemicals react when combined with other substance. Thus, alchemist improved the understanding of basic chemistry.
  17. 17. Alchemist were mainly skillful with metals, creating cheaper imitations of gold and silver. Through time, alchemist eventually believed that consuming transmuted gold is the secret to immortality, thus calling it the “Elixir of Life or the Philosopher’s Stone”
  18. 18. •Alchemical process lead to the discovery of caustic alkalis such as sodium hydroxide (NaOH) and ammonium salts. •The process of “distillation” was also refined because of alchemy.
  19. 19. During the renaissance, one of the most forceful men of that time, Paracelsus (1493- 1541) founded the school of iatrochemistry (medical chemistry). This led to the production of metallic medicines to cure illness thus encouraging alchemist to prepare drugs instead of transmuting metals to gold.
  20. 20. He also coined the term “alcohol” to spirits of wine. By late 18th century, traditional alchemy was fully separated from chemistry.
  21. 21. •In a sheet of paper, write a short essay on how the ancient discoveries in science been useful today. (Provide real examples of studies or any breakthrough in Science.)

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