
Lecture 22 11/03/2016
... CLICKER QUESTION #1 How many of the following statements about atomic theory are still believed to be TRUE? I. All atoms of the same element are identical. II. Negatively charged particles are embedded in a positively charged cloud throughout the atom. III. As verified by Rutherford, only positivel ...
... CLICKER QUESTION #1 How many of the following statements about atomic theory are still believed to be TRUE? I. All atoms of the same element are identical. II. Negatively charged particles are embedded in a positively charged cloud throughout the atom. III. As verified by Rutherford, only positivel ...
Chemistry Cram Sheet
... Protons, Neutrons, and Electrons Protons – found in _nucleus have charge of __+1__ Electrons – found outside of nucleus in the electron cloud and have charge of _-1___ Neutrons – found in _nucleus have no charge The number of _protons__ always equals the number of __electrons__ in a neutral atom. In ...
... Protons, Neutrons, and Electrons Protons – found in _nucleus have charge of __+1__ Electrons – found outside of nucleus in the electron cloud and have charge of _-1___ Neutrons – found in _nucleus have no charge The number of _protons__ always equals the number of __electrons__ in a neutral atom. In ...
Introduction To Chemistry 30 - Prairie Spirit School Division
... COMPONENTS OF AN ATOM The modern atom as viewed by scientists today consists of three main ...
... COMPONENTS OF AN ATOM The modern atom as viewed by scientists today consists of three main ...
Oct 14th ,2015
... (except the ion assessment) • You make make any handwritten notes on it you want. ( I will give some hints on that through out the year) • Find a safe and easily accessible place for it. – If you don’t have a pocket you can make one out of the provided cardstock later today in your ...
... (except the ion assessment) • You make make any handwritten notes on it you want. ( I will give some hints on that through out the year) • Find a safe and easily accessible place for it. – If you don’t have a pocket you can make one out of the provided cardstock later today in your ...
Chapter 4, Lesson 2: The Periodic Table
... The atomic mass of an element is based on the mass of the protons, neutrons, and electrons of the atoms of that element. The mass of the proton and neutron are about the same, but the mass of the electron is much smaller (about 1/2000 the mass of the proton or neutron). The majority of the atomic ma ...
... The atomic mass of an element is based on the mass of the protons, neutrons, and electrons of the atoms of that element. The mass of the proton and neutron are about the same, but the mass of the electron is much smaller (about 1/2000 the mass of the proton or neutron). The majority of the atomic ma ...
04 Atom notes
... John Dalton (English chemist & schoolteacher, _____________) using _______________________________________________________________ _____________________________________________________________________ How was John Dalton able to study atoms even though he was unable to see them directly? What eviden ...
... John Dalton (English chemist & schoolteacher, _____________) using _______________________________________________________________ _____________________________________________________________________ How was John Dalton able to study atoms even though he was unable to see them directly? What eviden ...
Cleaning Up With Atom Economy
... Atom economy means maximizing the incorporation of material from the starting materials or reagents into the final product. It is essentially pollution prevention at the molecular level. For example, a chemist practicing atom economy would choose to synthesize a needed product by putting together ba ...
... Atom economy means maximizing the incorporation of material from the starting materials or reagents into the final product. It is essentially pollution prevention at the molecular level. For example, a chemist practicing atom economy would choose to synthesize a needed product by putting together ba ...
electron configuration
... principle states that it is fundamentally impossible to know precisely both the velocity and position of a particle at the same time. ...
... principle states that it is fundamentally impossible to know precisely both the velocity and position of a particle at the same time. ...
Final Exam Practice-2017
... 20. Examine the Lewis structure for propanal, C3H6O. Which of the following descriptions about its structure is correct? a) This is a correct Lewis structure b) There are too many electrons in this diagram. The lone pair on carbon should be removed. c) There are too many electrons in this diagram. T ...
... 20. Examine the Lewis structure for propanal, C3H6O. Which of the following descriptions about its structure is correct? a) This is a correct Lewis structure b) There are too many electrons in this diagram. The lone pair on carbon should be removed. c) There are too many electrons in this diagram. T ...
Quantitative periodic table – dominoes
... Teaching notes This is a domino style activity. There are 32 cards, allowing it to be used with a whole class. The activity could also be done individually, in pairs or in small groups to produce a complete ordered set of cards. Differentiation: the cards generally increase in difficulty from the st ...
... Teaching notes This is a domino style activity. There are 32 cards, allowing it to be used with a whole class. The activity could also be done individually, in pairs or in small groups to produce a complete ordered set of cards. Differentiation: the cards generally increase in difficulty from the st ...
NOTES: ATOMIC THEORY
... existence of positrons was first postulated in 1928 by Paul Dirac as an inevitable consequence of the Dirac equation. Anderson gave the positron its name; he also unsuccessfully suggested renaming electrons "negatrons." The positron was the first evidence of antimatter and was discovered by passing ...
... existence of positrons was first postulated in 1928 by Paul Dirac as an inevitable consequence of the Dirac equation. Anderson gave the positron its name; he also unsuccessfully suggested renaming electrons "negatrons." The positron was the first evidence of antimatter and was discovered by passing ...
PowerPoint for Cornell Notes
... • The law of conservation of mass must be satisfied. (Equation must be balanced). ...
... • The law of conservation of mass must be satisfied. (Equation must be balanced). ...
CHAPTER 2 ATOMS, MOLECULES, AND IONS
... Dividing both subscripts by 2, the simplest whole number ratio of the atoms in Al2Br6 is AlBr3. Dividing all subscripts by 2, the simplest whole number ratio of the atoms in Na2S2O4 is NaSO2. The molecular formula as written, N2O5, contains the simplest whole number ratio of the atoms present. In th ...
... Dividing both subscripts by 2, the simplest whole number ratio of the atoms in Al2Br6 is AlBr3. Dividing all subscripts by 2, the simplest whole number ratio of the atoms in Na2S2O4 is NaSO2. The molecular formula as written, N2O5, contains the simplest whole number ratio of the atoms present. In th ...
CHAPTER 2 ATOMS, MOLECULES, AND IONS
... Dividing both subscripts by 2, the simplest whole number ratio of the atoms in Al2Br6 is AlBr3. Dividing all subscripts by 2, the simplest whole number ratio of the atoms in Na2S2O4 is NaSO2. The molecular formula as written, N2O5, contains the simplest whole number ratio of the atoms present. In th ...
... Dividing both subscripts by 2, the simplest whole number ratio of the atoms in Al2Br6 is AlBr3. Dividing all subscripts by 2, the simplest whole number ratio of the atoms in Na2S2O4 is NaSO2. The molecular formula as written, N2O5, contains the simplest whole number ratio of the atoms present. In th ...
Exam I CHEM 1303.001 KEY FALL 2009 Part 1. Nomenclature. 10
... From the list below, which are strong acids? HCl H3PO4 HF H2SO4 HNO3 HCl, H2SO4, and HNO3 ONLY Silver, Ag, has two naturally occurring isotopes in an approximate 50:50 ratio. One of these isotopes has a mass of 108.90476 amu. Of the following, which one must be the other isotope? ...
... From the list below, which are strong acids? HCl H3PO4 HF H2SO4 HNO3 HCl, H2SO4, and HNO3 ONLY Silver, Ag, has two naturally occurring isotopes in an approximate 50:50 ratio. One of these isotopes has a mass of 108.90476 amu. Of the following, which one must be the other isotope? ...
Name Block Hon 1 Chemistry I – Ms. Elder Chapter 3 Atomic
... 3-3 Modern Atomic Theory What are the names and properties of the 3 subatomic particles? How can you determine the # of protons, neutrons, and electrons in an atom/ion? What is an isotope? What is atomic mass? ...
... 3-3 Modern Atomic Theory What are the names and properties of the 3 subatomic particles? How can you determine the # of protons, neutrons, and electrons in an atom/ion? What is an isotope? What is atomic mass? ...
Ch2-A
... The atomic number of atom X is 72, the mass number is 36, how many protons are present? –neutrons? Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings ...
... The atomic number of atom X is 72, the mass number is 36, how many protons are present? –neutrons? Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings ...
Chemistry Common Assessment Quarter One
... 2 points well developed explantion 3 points well developed explantion with examples 4 points well developed explanation, examples, and critical connections 54. Explain how the atoms of one element differ from those of another element. 55. Explain why the 4s sublevel fills before the 3d sublevel begi ...
... 2 points well developed explantion 3 points well developed explantion with examples 4 points well developed explanation, examples, and critical connections 54. Explain how the atoms of one element differ from those of another element. 55. Explain why the 4s sublevel fills before the 3d sublevel begi ...
Notes. - Net Start Class
... Metalloids: found along the stair-step line Synthetic: made in the laboratory and not yet found in nature – many of the Actinide and Lanthanide series and very large # elements. ...
... Metalloids: found along the stair-step line Synthetic: made in the laboratory and not yet found in nature – many of the Actinide and Lanthanide series and very large # elements. ...
Chemistry Common Assessment Quarter One
... 2 points well developed explantion 3 points well developed explantion with examples 4 points well developed explanation, examples, and critical connections 54. Explain how the atoms of one element differ from those of another element. 55. Explain why the 4s sublevel fills before the 3d sublevel begi ...
... 2 points well developed explantion 3 points well developed explantion with examples 4 points well developed explanation, examples, and critical connections 54. Explain how the atoms of one element differ from those of another element. 55. Explain why the 4s sublevel fills before the 3d sublevel begi ...
Chapter 7 Models of Atomic Structure
... the planets, but they do not spiral inward and crash. Why? Because they revolve at just the right speed to remain in their orbits. Similarly, the atom’s positive nucleus exerts a strong force of attraction on the negative electrons. The electrons do not spiral inward and crash, however, because they ...
... the planets, but they do not spiral inward and crash. Why? Because they revolve at just the right speed to remain in their orbits. Similarly, the atom’s positive nucleus exerts a strong force of attraction on the negative electrons. The electrons do not spiral inward and crash, however, because they ...
Chapter 4 Chem classnotes
... determine simultaneously both the position and velocity of an electron or any other particle. Quantum theory describes mathematically the wave properties of electrons and other very small particles. An orbital is a three dimensional region around a nucleus that indicates the probable location of an ...
... determine simultaneously both the position and velocity of an electron or any other particle. Quantum theory describes mathematically the wave properties of electrons and other very small particles. An orbital is a three dimensional region around a nucleus that indicates the probable location of an ...
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.