February Homework Packet
... 8. How do the energy and the most probable location of an electron in the third shell of an atom compare to the energy and the most probable location of an electron in the first shell of the same atom? (1) In the third shell, an electron has more energy and is closer to the nucleus. (2) In the third ...
... 8. How do the energy and the most probable location of an electron in the third shell of an atom compare to the energy and the most probable location of an electron in the first shell of the same atom? (1) In the third shell, an electron has more energy and is closer to the nucleus. (2) In the third ...
Covalent Bonding and Nomenclature
... Beryllium has only four electrons around it. Back to main menu ...
... Beryllium has only four electrons around it. Back to main menu ...
Ch 3 Review_2014a
... Who developed the four postulates of atomic theory, including atoms are the smallest, indivisible part of an element? Ans: ...
... Who developed the four postulates of atomic theory, including atoms are the smallest, indivisible part of an element? Ans: ...
110 REVIEW MATERIALTro 2011
... Example 1: What is the specific gravity of ethanol? The density of ethanol = 0.791 g ethanol / 1 mL ethanol The density of water = 1.00 g H2O / 1 mL H2O ...
... Example 1: What is the specific gravity of ethanol? The density of ethanol = 0.791 g ethanol / 1 mL ethanol The density of water = 1.00 g H2O / 1 mL H2O ...
Chapter 2 – Atoms, Ions and Compounds
... (green). – The formula, NaCl, indicates a 1-to-1 ratio of Na+ ions and Cl– ions present, not the presence of only one ion of each. ...
... (green). – The formula, NaCl, indicates a 1-to-1 ratio of Na+ ions and Cl– ions present, not the presence of only one ion of each. ...
6.1 Moles and Molar Masses
... Empirical formulas can be calculated from lab data, allowing us to identify unknown compounds: STEP 1: Assume mass percentages represent masses, in g: STEP 2: Divide each element's mass by their respective molar masses, turning them into moles. STEP 3: Divide all moles by the lowest number of moles ...
... Empirical formulas can be calculated from lab data, allowing us to identify unknown compounds: STEP 1: Assume mass percentages represent masses, in g: STEP 2: Divide each element's mass by their respective molar masses, turning them into moles. STEP 3: Divide all moles by the lowest number of moles ...
chapter 2: atoms, ions, and molecules
... – When atoms lose or gain electrons, they form charged particles called ions. – Metals lose electrons → positively charged ions = cations – Nonmetals gain electrons → negatively charged ions = anions Main-group elements generally form ions—i.e. gain or lose electrons—to get the same number of electr ...
... – When atoms lose or gain electrons, they form charged particles called ions. – Metals lose electrons → positively charged ions = cations – Nonmetals gain electrons → negatively charged ions = anions Main-group elements generally form ions—i.e. gain or lose electrons—to get the same number of electr ...
C1a Revision notes - Calthorpe Park Moodle
... smaller and smaller units, and eventually there would be a tiny particle that could not be divided any further - an atom. This was remarkable because there was no way ancient Greeks could support this theory by observation or experiment. John Dalton ...
... smaller and smaller units, and eventually there would be a tiny particle that could not be divided any further - an atom. This was remarkable because there was no way ancient Greeks could support this theory by observation or experiment. John Dalton ...
The History of the Modern Periodic Table
... At the same time, he published his own table of the elements organized by increasing atomic mass. ...
... At the same time, he published his own table of the elements organized by increasing atomic mass. ...
PPT - Unit 3 Exam Review
... A. There was evidence to support it. B. Democritus said that it was correct C. Dalton invented the electron microscope D. Dalton showed how molecules are formed ...
... A. There was evidence to support it. B. Democritus said that it was correct C. Dalton invented the electron microscope D. Dalton showed how molecules are formed ...
Chemistry SOL Review
... Quantum-Mechanical Model • Electron energy levels are wave functions. • Electrons are found in orbitals, regions of space where an electron is most likely to be found. • You can’t know both where the electron is and where it is going at the same time. • Electrons buzz around the nucleus like gnats b ...
... Quantum-Mechanical Model • Electron energy levels are wave functions. • Electrons are found in orbitals, regions of space where an electron is most likely to be found. • You can’t know both where the electron is and where it is going at the same time. • Electrons buzz around the nucleus like gnats b ...
Chapter 4 Chemical Foundations: Elements, Atoms, and Ions
... The pesticide known as DDT paralyzes insects by binding to their nerve cells, leading to uncontrolled firing of the nerves. Before most uses of DDT were banned in the U.S., many insects had developed a resistance to it. Write out the formula for DDT. It contains 14 carbon atoms, 9 hydrogen atoms, an ...
... The pesticide known as DDT paralyzes insects by binding to their nerve cells, leading to uncontrolled firing of the nerves. Before most uses of DDT were banned in the U.S., many insects had developed a resistance to it. Write out the formula for DDT. It contains 14 carbon atoms, 9 hydrogen atoms, an ...
Powerpoint
... • Dalton turned Democritus’s idea into a scientific theory that could be tested by experiment. • But not all aspects of Dalton’s theory have proven to be correct. We now know that: – Atoms are divisible into even smaller particles. – A given element can have atoms with different masses. ...
... • Dalton turned Democritus’s idea into a scientific theory that could be tested by experiment. • But not all aspects of Dalton’s theory have proven to be correct. We now know that: – Atoms are divisible into even smaller particles. – A given element can have atoms with different masses. ...
Unit_1_The_Atom
... • Dalton turned Democritus’s idea into a scientific theory that could be tested by experiment. • But not all aspects of Dalton’s theory have proven to be correct. We now know that: – Atoms are divisible into even smaller particles. – A given element can have atoms with different masses. ...
... • Dalton turned Democritus’s idea into a scientific theory that could be tested by experiment. • But not all aspects of Dalton’s theory have proven to be correct. We now know that: – Atoms are divisible into even smaller particles. – A given element can have atoms with different masses. ...
Unit 1 Powerpoint Notes
... • Dalton turned Democritus’s idea into a scientific theory that could be tested by experiment. • But not all aspects of Dalton’s theory have proven to be correct. We now know that: – Atoms are divisible into even smaller particles. – A given element can have atoms with different masses. ...
... • Dalton turned Democritus’s idea into a scientific theory that could be tested by experiment. • But not all aspects of Dalton’s theory have proven to be correct. We now know that: – Atoms are divisible into even smaller particles. – A given element can have atoms with different masses. ...
CHAPTER 10
... four fluorines are placed around iodine, the total number of valence electrons is 35. Only 34 electrons are required to complete a trigonal bipyramidal electron-pair arrangement with four bonds and one lone pair of electrons. Taking one valence electron away gives the cation, IF4. ...
... four fluorines are placed around iodine, the total number of valence electrons is 35. Only 34 electrons are required to complete a trigonal bipyramidal electron-pair arrangement with four bonds and one lone pair of electrons. Taking one valence electron away gives the cation, IF4. ...
11th Grade IB Chemistry
... HISTORY OF THE ATOM Rutherford’s new evidence allowed him to propose a more detailed model with a central nucleus. He suggested that the positive charge was all in a central nucleus. With this holding the electrons in place by electrical ...
... HISTORY OF THE ATOM Rutherford’s new evidence allowed him to propose a more detailed model with a central nucleus. He suggested that the positive charge was all in a central nucleus. With this holding the electrons in place by electrical ...
Export To Word
... A. A working definition of matter is that it takes up space, has mass, and has measurable properties. Matter is comprised of atomic, subatomic, and elementary particles. B. Electrons are key to defining chemical and some physical properties, reactivity, and molecular structures. Repeating (periodic) ...
... A. A working definition of matter is that it takes up space, has mass, and has measurable properties. Matter is comprised of atomic, subatomic, and elementary particles. B. Electrons are key to defining chemical and some physical properties, reactivity, and molecular structures. Repeating (periodic) ...
Chemistry Definitions
... molecules adjust their shapes so that the valence electron pairs are as far apart from possible. Binary compound: A compound that consists of two elements. Lewis structure: A diagram showing the location of electrons in pairs around the atoms in a compound. Bond length: A measure of the distance bet ...
... molecules adjust their shapes so that the valence electron pairs are as far apart from possible. Binary compound: A compound that consists of two elements. Lewis structure: A diagram showing the location of electrons in pairs around the atoms in a compound. Bond length: A measure of the distance bet ...
compound
... A chocolate chip cookie is an example of a __________, because ______________. a. compound, the ingredients are chemically bonded. b. compound, it is the same throughout. c. mixture, you can separate out the chips. d. mixture, you cannot distinguish between the ingredients. ...
... A chocolate chip cookie is an example of a __________, because ______________. a. compound, the ingredients are chemically bonded. b. compound, it is the same throughout. c. mixture, you can separate out the chips. d. mixture, you cannot distinguish between the ingredients. ...
The mole
... 1. Use the Avogadro constant to convert between number of moles and the number of atoms, molecules, or ions in a sample. 2. Calculate the average molar mass of an element, an ion, or a compound. 3. Convert between mass and number of moles by using the molar mass. 4. Convert between volume and number ...
... 1. Use the Avogadro constant to convert between number of moles and the number of atoms, molecules, or ions in a sample. 2. Calculate the average molar mass of an element, an ion, or a compound. 3. Convert between mass and number of moles by using the molar mass. 4. Convert between volume and number ...
Agenda/To Do - Perry Local Schools
... A. Dimitri Mendeleev - created the first periodic table *(1871) 1. Organized by similar physical and chemical properties between the elements. 2. Arranged the elements into rows in order of increasing mass so that elements of similar properties were in the same ...
... A. Dimitri Mendeleev - created the first periodic table *(1871) 1. Organized by similar physical and chemical properties between the elements. 2. Arranged the elements into rows in order of increasing mass so that elements of similar properties were in the same ...
Unit 10 packet
... You have already learned about the concept of atoms and how they can combine to form compounds. You have also seen that each element has its own characteristic set of properties which help to distinguish it from all other elements. In this chapter we will study the structure of atoms and the laws go ...
... You have already learned about the concept of atoms and how they can combine to form compounds. You have also seen that each element has its own characteristic set of properties which help to distinguish it from all other elements. In this chapter we will study the structure of atoms and the laws go ...
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.