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Chapter 2
Chapter 2

... Atoms, Molecules, and Ions ...
Name Date Period______________ DIRECTED READING
Name Date Period______________ DIRECTED READING

... Section 1: Development of the Atomic Theory (p. 280) 3. Atoms are NOT a. a relatively new idea to us. b. the building blocks of all matter. c. the smallest particles into which an element can be divided and still be the same substance. d. seen with the scanning tunneling microscope. 4. An explanatio ...
and the atomic
and the atomic

... information from the following scientists • however, it would be “embarrassing” if you went through this course and never heard of these guys ...
intro to atoms
intro to atoms

... philosopher Democritus who began the search for a description of matter more than 2400 years ago.  He asked: Could matter be divided into smaller and smaller pieces forever, or was there a limit to the number of times a piece of matter could be divided? ...
what is matter made of? - SSFA-MsKahan
what is matter made of? - SSFA-MsKahan

... 1. Discovered that atoms have negatively charged particles in them 2. Concluded that since atoms are neutral they must also contain positive particles to balance the negatively charged particles 3. Proposed that the atom is a lump of positively charged material with negative electrons all through it ...
A preview as well as the complete version of this
A preview as well as the complete version of this

... WITH LESSON PACKAGE - Match the scientist with his model of the atom as well as his atomic explanation. ...
Slide 1
Slide 1

... Ptotal = PA + PB + PC + ..... At low temperatures and high pressures real gases do not behave ideally. The reasons for the deviations from ideality are: 1. The molecules are very close to one another, thus their volume is important. 2. The molecular interactions also become important. ...
Chapter 2
Chapter 2

... 8. Describe two biological applications that use radioactive isotopes. 9. Define the terms energy and potential energy. Explain why electrons in the first electron shell have less potential energy than electrons in higher electron shells. 10. Distinguish among nonpolar covalent, polar covalent and ...
Chapter 2 Study Guides
Chapter 2 Study Guides

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Chapter 4 Powerpoint
Chapter 4 Powerpoint

... (aka Law of Definite Proportion) ...
atom - davis.k12.ut.us
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Democritus, Aristotle, and Other Greeks
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... matter is made up of four basic elements: earth, air, fire, and water. His theories are accepted in Europe until the 17th century. ...
Rutherford - Hawkapalooza1
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Atomic Structure Notes
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study guide - atomic srtucture/_classification of matter
study guide - atomic srtucture/_classification of matter

... idea that all things were made of particles too small to see. He was laughed at. In the 1800’s John Dalton proposed the idea of the “Atomic Theory”. He had 5 theories, 3 of which are still believed today. They are: 1. All matter is composed of extremely small particles too small to see 2. In reactio ...
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QI2: Atomic Structure
QI2: Atomic Structure

... atom. He suggested that the atom was like a _____ system, with a nucleus in the middle like a sun, and electrons orbiting around like _____. There were some problems with this model. But at about the same time Planck and others were developing the _____ theory. Bohr incorporated the quantum theory i ...
AP Projectile Motion
AP Projectile Motion

... Only about 118 different elements make up all the materials we know ç Only 88 of these are found in nature ç The remaining elements are made in laboratories and are too unstable (radioactive) to occur in nature in significant amounts ç Greater than 99% of matter on earth is formed by about a dozen e ...
Blue File
Blue File

... Over the years Many Scientists have put forward ‘models’ that they have arrived at from their research of what they understand an atom to look like……. Firstly came : ‘J.J Thompson’s ‘Plum Pudding ‘ model which showed that ‘atoms were tiny balls of positive charge with tiny negative particles stuck i ...
Atomic Theory - Mikus
Atomic Theory - Mikus

... each other. Dalton started it all out by helping us to understand that each atom is different. He discovered that each atom had its own weight and properties, but he could not explain why this was the case. J.J. Thomson picked up on Dalton’s discoveries and added that each atom has electrons. He kne ...
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... one kind of atom that cannot be broken down into other substances by chemical or physical means. Atoms are the smallest units of an element that has the properties of that element. Atoms are made of subatomic particles (protons, neutrons, and electrons): ...
ps ch 4 rev 2015ans
ps ch 4 rev 2015ans

... 27. Explain in detail the Thomson model of the atom and why it was important to the understanding of the atom as we know it today. The Thompson model was based on the idea of Plum Pudding or a chocolate chip cookie. The pudding was the positively charged substance and inside of that scattered around ...
Today in Science - Canton Local Schools
Today in Science - Canton Local Schools

... • 1st idea of “atoms” • Believed all matter is made up of tiny particles separated by space • Named particles “atomos” which means indivisible. • Founder of modern chemistry • 1st carefully controlled experiments providing evidence to the Law of Conservation of Mass ...
Chemistry Standards Review
Chemistry Standards Review

... 38. What is the kinetic molecular theory? 39. How do gases create pressure, use KMT to support your answer. 40. Explain diffusion, use KMT to support your answer. 41. Is Boyle’s law direct or inverse? Charles’s Law? Gay-Lussac’s Law? 42. If 735 L of a gas is at 3.11 atm and 34oC, what is its tempera ...
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History of molecular theory



In chemistry, the history of molecular theory traces the origins of the concept or idea of the existence of strong chemical bonds between two or more atoms.The modern concept of molecules can be traced back towards pre-scientific Greek philosophers such as Leucippus who argued that all the universe is composed of atoms and voids. Circa 450 BC Empedocles imagined fundamental elements (fire (20px), earth (20px), air (20px), and water (20px)) and ""forces"" of attraction and repulsion allowing the elements to interact. Prior to this, Heraclitus had claimed that fire or change was fundamental to our existence, created through the combination of opposite properties. In the Timaeus, Plato, following Pythagoras, considered mathematical entities such as number, point, line and triangle as the fundamental building blocks or elements of this ephemeral world, and considered the four elements of fire, air, water and earth as states of substances through which the true mathematical principles or elements would pass. A fifth element, the incorruptible quintessence aether, was considered to be the fundamental building block of the heavenly bodies. The viewpoint of Leucippus and Empedocles, along with the aether, was accepted by Aristotle and passed to medieval and renaissance Europe. A modern conceptualization of molecules began to develop in the 19th century along with experimental evidence for pure chemical elements and how individual atoms of different chemical substances such as hydrogen and oxygen can combine to form chemically stable molecules such as water molecules.
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