J.J. Thomson and the Cathode Ray Tube 1897
... • Electrons have orbits about the nucleus (planetary theory) • Electrons could only exist at given energy levels • An energy level is where an electron is likely to be moving • Energy levels were like steps on a ladder – An electron can only be at any given step at any given time ...
... • Electrons have orbits about the nucleus (planetary theory) • Electrons could only exist at given energy levels • An energy level is where an electron is likely to be moving • Energy levels were like steps on a ladder – An electron can only be at any given step at any given time ...
Safety - Wando High School
... 1. What makes a covalent bond? What makes an ionic bond? 2. What happens with the electrons in an ionic and covalent bond? 3. Why do atoms bond? 4. In a chemical formula what do the symbols and numbers represent? 5. What is a molecule? Is CO2 a molecule? Is NaCl a molecule? 6. What is an elements ox ...
... 1. What makes a covalent bond? What makes an ionic bond? 2. What happens with the electrons in an ionic and covalent bond? 3. Why do atoms bond? 4. In a chemical formula what do the symbols and numbers represent? 5. What is a molecule? Is CO2 a molecule? Is NaCl a molecule? 6. What is an elements ox ...
Atoms and Periodic Table Unit Name
... 24 - Electron’s in the outer most shell. 25 - These are good conductors of heat and electricity. They also have luster and a high density 27 - Metals are considered this if they can be made into wire. 29 - There are this many known quarks? 30 - The attraction that holds atoms close to each other 32 ...
... 24 - Electron’s in the outer most shell. 25 - These are good conductors of heat and electricity. They also have luster and a high density 27 - Metals are considered this if they can be made into wire. 29 - There are this many known quarks? 30 - The attraction that holds atoms close to each other 32 ...
Semester Exam Review - Teach-n-Learn-Chem
... a. Atoms contain negative particles called electrons. b. The mass of an electron is 9.11 10-28 g. c. Atoms contain neutral particles called neutrons. d. Atoms contain a dense, positive nucleus. e. Atoms are indivisible and resemble billiard balls. 2. Describe the evolution of the atomic model from ...
... a. Atoms contain negative particles called electrons. b. The mass of an electron is 9.11 10-28 g. c. Atoms contain neutral particles called neutrons. d. Atoms contain a dense, positive nucleus. e. Atoms are indivisible and resemble billiard balls. 2. Describe the evolution of the atomic model from ...
Atomic Mass - AJS Phyiscs and Chemistry
... • The period number tells you how many energy levels you have. • Periods 6 and 7 have 14 additional elements that are listed at the bottom of the periodic table so it is easier to print the table on a standard page. • Properties change in 2 ways as you move from left to right across a period: – The ...
... • The period number tells you how many energy levels you have. • Periods 6 and 7 have 14 additional elements that are listed at the bottom of the periodic table so it is easier to print the table on a standard page. • Properties change in 2 ways as you move from left to right across a period: – The ...
Multiple Choice - EDU360ScienceMethods
... The vertical rows are called periods. The elements that share a period have the same number of atomic orbitals. The elements that are within the same group have the same number of electrons in their outer atomic orbitals. All the elements within a same family have the same properties. It is organize ...
... The vertical rows are called periods. The elements that share a period have the same number of atomic orbitals. The elements that are within the same group have the same number of electrons in their outer atomic orbitals. All the elements within a same family have the same properties. It is organize ...
Chapter 4 Review Worksheet
... 5. Given the relative abundance of the following naturally occurring isotopes of oxygen, calculate the average atomic mass of oxygen. Assume that the atomic mass of each is the same as the mass number. oxygen- 16: 99.76% oxygen17: 0.037% oxygen-18: 0.204% ...
... 5. Given the relative abundance of the following naturally occurring isotopes of oxygen, calculate the average atomic mass of oxygen. Assume that the atomic mass of each is the same as the mass number. oxygen- 16: 99.76% oxygen17: 0.037% oxygen-18: 0.204% ...
Unit B - Topic 2.0 Notes
... • The period number tells you how many energy levels you have. • Periods 6 and 7 have 14 additional elements that are listed at the bottom of the periodic table so it is easier to print the table on a standard page. • Properties change in 2 ways as you move from left to right across a period: – The ...
... • The period number tells you how many energy levels you have. • Periods 6 and 7 have 14 additional elements that are listed at the bottom of the periodic table so it is easier to print the table on a standard page. • Properties change in 2 ways as you move from left to right across a period: – The ...
Inside the Atom
... We defined an element as a substance that can not be broken down any more than it already is. This is because elements contain only one type of atom. Is it really impossible to then break down an element? It was until the discovery of nuclear reactions, but even before this scientists were discoveri ...
... We defined an element as a substance that can not be broken down any more than it already is. This is because elements contain only one type of atom. Is it really impossible to then break down an element? It was until the discovery of nuclear reactions, but even before this scientists were discoveri ...
Unit 3 - Section 5.1 Introduction to Chemistry
... different number of neutrons. The diagram shows three isotopes of hydrogen: protium (no neutrons), deuterium (1 neutron) and tritium (2 neutrons). Since neutrons has no electrical charge, the chemistry of the element is not impacted. However, the mass of the element changes. Isotopes can be stable o ...
... different number of neutrons. The diagram shows three isotopes of hydrogen: protium (no neutrons), deuterium (1 neutron) and tritium (2 neutrons). Since neutrons has no electrical charge, the chemistry of the element is not impacted. However, the mass of the element changes. Isotopes can be stable o ...
Chemistry I Honors – Semester Exam Review – Fall 2000
... c. Atoms contain neutral particles called neutrons. d. Atoms contain a dense, positive nucleus. e. Atoms are indivisible and resemble billiard balls. 2. Describe the evolution of the atomic model from the billiard ball model to the electron cloud model. 3. Write the isotope symbol, including atomic ...
... c. Atoms contain neutral particles called neutrons. d. Atoms contain a dense, positive nucleus. e. Atoms are indivisible and resemble billiard balls. 2. Describe the evolution of the atomic model from the billiard ball model to the electron cloud model. 3. Write the isotope symbol, including atomic ...
U3 Quiz 1: Discovery of the Atom
... ____ 11. When an electrical current passed through a glass tube, a paddle wheel placed between the electrodes moved. Scientists concluded that a. a magnetic field was produced. b. particles were passing from the cathode to the anode. c. there was gas in the tube. d. atoms were indivisible. ____ 12. ...
... ____ 11. When an electrical current passed through a glass tube, a paddle wheel placed between the electrodes moved. Scientists concluded that a. a magnetic field was produced. b. particles were passing from the cathode to the anode. c. there was gas in the tube. d. atoms were indivisible. ____ 12. ...
PS_Module 4 - Leon County Schools
... Lewis Dot Structure • The Lewis Dot Structure is a bit different from the Bohr model. • It only shows the element symbol and it’s outer most electron shell. ...
... Lewis Dot Structure • The Lewis Dot Structure is a bit different from the Bohr model. • It only shows the element symbol and it’s outer most electron shell. ...
Honors Chemistry
... 10. Give the different waves of the magnetic spectrum. 11. Which wave has more energy: red or blue? Short or long? Microwave or x-ray? 12. What does Bohr’s Model say about the hydrogen atom? 13. What does it mean when an electron is excited? What happens when the excited electron returns to the grou ...
... 10. Give the different waves of the magnetic spectrum. 11. Which wave has more energy: red or blue? Short or long? Microwave or x-ray? 12. What does Bohr’s Model say about the hydrogen atom? 13. What does it mean when an electron is excited? What happens when the excited electron returns to the grou ...
Dalton, Plum Pudding, and Rutherford`s Atomic Theories (Models) 9
... • Alpha particles (small, positive particles) were aimed at a thin piece of metal (gold) foil. ...
... • Alpha particles (small, positive particles) were aimed at a thin piece of metal (gold) foil. ...
Chemistry 11 – Course Outcomes
... Explain the hydrogen line spectrum in terms of Bohr Model of the atom State two differences between the Bohr model and the quantum mechanical model of the atom Draw an energy level diagram for a given atom Define valence shell and valence electrons Label the sublevels on an energy level diagram with ...
... Explain the hydrogen line spectrum in terms of Bohr Model of the atom State two differences between the Bohr model and the quantum mechanical model of the atom Draw an energy level diagram for a given atom Define valence shell and valence electrons Label the sublevels on an energy level diagram with ...
Slide 1
... isotope (usually the most abundant) of an element. • Atomic mass is the weighted average of all of the isotopes of an element. • Atomic masses on the periodic table are not whole numbers because they contain the mass numbers all of the isotopes of an element and can thus be fractions. • In many case ...
... isotope (usually the most abundant) of an element. • Atomic mass is the weighted average of all of the isotopes of an element. • Atomic masses on the periodic table are not whole numbers because they contain the mass numbers all of the isotopes of an element and can thus be fractions. • In many case ...
Notes: Structure of matter
... 2 or more substances combined with each keeping it‘s identity. Not chemically combined and can be ...
... 2 or more substances combined with each keeping it‘s identity. Not chemically combined and can be ...
Development of Atomic Theory
... • Atoms of a given element are all the same, elements of different elements are different • Weight of atoms distinguished one from another ...
... • Atoms of a given element are all the same, elements of different elements are different • Weight of atoms distinguished one from another ...
Atomic Theory of Matter: matter is made up of fundamental particles
... Believed that atoms were indestructible and ________________________. ___________________ Atomic Theory (1st Scientific Theory, 1803) Dalton learned about atoms by studying the ratios in which elements combine in chemical reactions. 1. All matter is made up of _________________. 2. Atoms are _____ ...
... Believed that atoms were indestructible and ________________________. ___________________ Atomic Theory (1st Scientific Theory, 1803) Dalton learned about atoms by studying the ratios in which elements combine in chemical reactions. 1. All matter is made up of _________________. 2. Atoms are _____ ...
Chapter 4 Notes - DunlapChemistry
... In different energy levels; each row on the periodic table is a new energy level Do not contribute to atomic mass A proton’s mass is 1800 times greater than that of an electron Gained, lost or shared in bonding Neutrons Neutral charge (no charge) In the nucleus Contribute to atomic mass Never gained ...
... In different energy levels; each row on the periodic table is a new energy level Do not contribute to atomic mass A proton’s mass is 1800 times greater than that of an electron Gained, lost or shared in bonding Neutrons Neutral charge (no charge) In the nucleus Contribute to atomic mass Never gained ...
