Chapter 18 Notes
... atomic theory—states that all matter is composed of tiny particles called atoms o John Dalton was one of the first scientists to gather evidence for the atomic theory o Dalton’s Atomic Theory: • Each element is composed of atoms • All atoms of a given element are identical • Atoms of different eleme ...
... atomic theory—states that all matter is composed of tiny particles called atoms o John Dalton was one of the first scientists to gather evidence for the atomic theory o Dalton’s Atomic Theory: • Each element is composed of atoms • All atoms of a given element are identical • Atoms of different eleme ...
Chapter 4 Study Guide Section 4.1 What was Dalton`s Atomic
... 2. Ionization energy is the amount of energy needed to pull away the outermost electron from an atom. 3. Electron affinity is the energy released when an electron is added to an atom. Section 4.6 1. Electromagnetic radiation is energy in a wave form that has electric and magnetic fields. 2. Waveleng ...
... 2. Ionization energy is the amount of energy needed to pull away the outermost electron from an atom. 3. Electron affinity is the energy released when an electron is added to an atom. Section 4.6 1. Electromagnetic radiation is energy in a wave form that has electric and magnetic fields. 2. Waveleng ...
CH 2 Linear
... ATOMS & THEIR STRUCTURE Early Ideas: Greek Philosophers (2500 years ago) only observed matter, but did not test their hypotheses with experiments... No scientific model/method was followed. Example: Piece of aluminum foil. How small can one cut the pieces of foil and still have aluminum? If I co ...
... ATOMS & THEIR STRUCTURE Early Ideas: Greek Philosophers (2500 years ago) only observed matter, but did not test their hypotheses with experiments... No scientific model/method was followed. Example: Piece of aluminum foil. How small can one cut the pieces of foil and still have aluminum? If I co ...
Introduction to Chemistry for Coach Keith`s Biology
... Organisms eat plants, break down the sugars, and release energy along with CO 2 & H2O Exergonic reactions involve a net release of energy; while endergonic reactions involve a net absorption of energy Energy must be added to the reactants for most chemical reactions to occur; called activation energ ...
... Organisms eat plants, break down the sugars, and release energy along with CO 2 & H2O Exergonic reactions involve a net release of energy; while endergonic reactions involve a net absorption of energy Energy must be added to the reactants for most chemical reactions to occur; called activation energ ...
The Atom
... 1. Rays cast shadow on other end of tube- light 2. Rays push paddle along- some form of matter 3. Rays deflected by magnet- not light 4. Rays deflected by negative charge- therefore cathode rays are made up of negatively charged particles called electrons. ...
... 1. Rays cast shadow on other end of tube- light 2. Rays push paddle along- some form of matter 3. Rays deflected by magnet- not light 4. Rays deflected by negative charge- therefore cathode rays are made up of negatively charged particles called electrons. ...
History of the Atom
... Discovered/proposed the Law of Conservation of Mass (or Matter) which states, in a chemical reaction, matter is neither created nor destroyed ...
... Discovered/proposed the Law of Conservation of Mass (or Matter) which states, in a chemical reaction, matter is neither created nor destroyed ...
The Development of Atomic Theory
... different shapes and sizes. • They are always moving • They form different materials by joining together. ...
... different shapes and sizes. • They are always moving • They form different materials by joining together. ...
Atomic Structure powerpoint
... Bohr’s Model of the Hydrogen Atom ▫ Electrons are arranged in concentric circular paths or orbits around the nucleus ▫ Electrons in a particular path have a fixed energy ▫ The energy of the electron in an orbit is proportional to its distance from the nucleus. The further the electron is from the n ...
... Bohr’s Model of the Hydrogen Atom ▫ Electrons are arranged in concentric circular paths or orbits around the nucleus ▫ Electrons in a particular path have a fixed energy ▫ The energy of the electron in an orbit is proportional to its distance from the nucleus. The further the electron is from the n ...
2. Essential Chemistry
... o Molecules are formed by covalent bonds o A covalent bond is when two atoms share one or more pairs of outer-shell electrons (valence electrons) o In a covalent bond, the shared electrons count as part of each atom’s valence shell o Much stronger than ionic bonds – holds lots of Energy o A single c ...
... o Molecules are formed by covalent bonds o A covalent bond is when two atoms share one or more pairs of outer-shell electrons (valence electrons) o In a covalent bond, the shared electrons count as part of each atom’s valence shell o Much stronger than ionic bonds – holds lots of Energy o A single c ...
Observations Leading to the Nuclear Model of the Atom
... 3. atoms of different elements have different masses, physical properties, and chemical properties 4. atoms of different elements combine in simple whole numbers to form compounds 5. atoms of an element cannot be converted into atoms of other elements; chemical reactions involve reorganization of th ...
... 3. atoms of different elements have different masses, physical properties, and chemical properties 4. atoms of different elements combine in simple whole numbers to form compounds 5. atoms of an element cannot be converted into atoms of other elements; chemical reactions involve reorganization of th ...
Atomic Structure/Electrons
... 10. He discovered the electron and developed the “plum pudding” model. B 11. His five postulates make up atomic theory. A 12. His gold foil experiment led to his discovery of the nucleus. C 13. He developed the planetary model of the atom, which described the light spectrum. D 14. What is the shape ...
... 10. He discovered the electron and developed the “plum pudding” model. B 11. His five postulates make up atomic theory. A 12. His gold foil experiment led to his discovery of the nucleus. C 13. He developed the planetary model of the atom, which described the light spectrum. D 14. What is the shape ...
Atomic Theory reading packet
... relativity, quantum theory, and uncertainty that forced chemists to rethink the most basic concepts about atoms. As an example, the principle of uncertainty says that it is impossible to describe with perfect accuracy both the position and the motion of an object. In other words, you might be able t ...
... relativity, quantum theory, and uncertainty that forced chemists to rethink the most basic concepts about atoms. As an example, the principle of uncertainty says that it is impossible to describe with perfect accuracy both the position and the motion of an object. In other words, you might be able t ...
Matter
... properties of metals and some of the properties of nonmetals. Since they are not clearly one or the other, they are called metalloids, or semimetals. They are used in making semiconductors – materials which can conduct some electricity better than an insulator can, but not as well as a metal. They a ...
... properties of metals and some of the properties of nonmetals. Since they are not clearly one or the other, they are called metalloids, or semimetals. They are used in making semiconductors – materials which can conduct some electricity better than an insulator can, but not as well as a metal. They a ...
Notes matter energy
... Of the more than 100 elements, 81 are stable. About 10 elements account for 95% of the mass of the Earth’s crust Oxygen accounts for about 50% of the mass of the Earth’s crust and about 65% of the mass of the human body Classes of Elements Metalloids: appear with an edge of their box on the stepped ...
... Of the more than 100 elements, 81 are stable. About 10 elements account for 95% of the mass of the Earth’s crust Oxygen accounts for about 50% of the mass of the Earth’s crust and about 65% of the mass of the human body Classes of Elements Metalloids: appear with an edge of their box on the stepped ...
Atomic Theory & the Periodic Table
... thought they were gamma (γ) rays but they moved too fast for gamma rays. He worked his way thru some calculations and discovered they were not, but some neutral particles that he named (NEUTRONS) ...
... thought they were gamma (γ) rays but they moved too fast for gamma rays. He worked his way thru some calculations and discovered they were not, but some neutral particles that he named (NEUTRONS) ...
Chapter 2 Powerpoint slides
... calculated the charge to mass ratio for these negatively charged particles proposed the existence of positively charged particles • To balance the negative charge of the electrons ...
... calculated the charge to mass ratio for these negatively charged particles proposed the existence of positively charged particles • To balance the negative charge of the electrons ...
Structure of Atoms
... 〉What unit is used to express atomic mass? 〉Because working with such tiny masses is difficult, atomic masses are usually expressed in unified atomic mass units. • unified atomic mass unit: a unit of mass that describes the mass of an atom or molecule; it is exactly 1/12 the mass of a carbon atom wi ...
... 〉What unit is used to express atomic mass? 〉Because working with such tiny masses is difficult, atomic masses are usually expressed in unified atomic mass units. • unified atomic mass unit: a unit of mass that describes the mass of an atom or molecule; it is exactly 1/12 the mass of a carbon atom wi ...
Atomic Theory Timeline - Westgate Mennonite Collegiate
... Erwin Schrödinger's most important contribution to the current Atomic Model was his development of the mathematical description that described the paths electrons would most likely follow in their orbits around the nucleus. The formulas that Schrödinger developed in 1926 would be later called the ba ...
... Erwin Schrödinger's most important contribution to the current Atomic Model was his development of the mathematical description that described the paths electrons would most likely follow in their orbits around the nucleus. The formulas that Schrödinger developed in 1926 would be later called the ba ...
Chapter 2 Atoms, Molecules and Ions
... 2. The atoms of a given element are identical; the atoms of different elements are different in some fundamental way or ways 3. Chemical compounds are formed when atoms of different elements combine with each other. A given compound always has the same relative numbers and types of atoms 4. Chemical ...
... 2. The atoms of a given element are identical; the atoms of different elements are different in some fundamental way or ways 3. Chemical compounds are formed when atoms of different elements combine with each other. A given compound always has the same relative numbers and types of atoms 4. Chemical ...
No Slide Title
... When H atoms in alkanes are replaced by heteroatoms (atoms other than C or H), then we have introduced a functional group into the alkane. When an H is replaced by –OH, then we form an alcohol. Alcohols are also named by the number of C atoms. Consider propanol: there are two places for the OH: on a ...
... When H atoms in alkanes are replaced by heteroatoms (atoms other than C or H), then we have introduced a functional group into the alkane. When an H is replaced by –OH, then we form an alcohol. Alcohols are also named by the number of C atoms. Consider propanol: there are two places for the OH: on a ...
Atoms: Building Blocks of Matter
... –Nucleus: made up of protons and neutrons in center of atom Proton: positively charged particle Neutron: particle with no charge ...
... –Nucleus: made up of protons and neutrons in center of atom Proton: positively charged particle Neutron: particle with no charge ...
Atomic Structure
... Any-old-value of energy to be absorbed or released is NOT OK. This explains the lines of color in an emission spectrum. ...
... Any-old-value of energy to be absorbed or released is NOT OK. This explains the lines of color in an emission spectrum. ...
Atomic Theory
... 3. All atoms of the same element are identical in mass and size. The atoms of one element are different in mass and size from the atoms of other elements. 4. Compounds are created when atoms of different elements link together in specific proportions. ...
... 3. All atoms of the same element are identical in mass and size. The atoms of one element are different in mass and size from the atoms of other elements. 4. Compounds are created when atoms of different elements link together in specific proportions. ...
unit 3 slides days 1
... • To identify by name the key scientists involved in evolution of atomic theory • To identify by sequence and scientist name, the process/test used and discovery made ...
... • To identify by name the key scientists involved in evolution of atomic theory • To identify by sequence and scientist name, the process/test used and discovery made ...
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.