Power Point 2/17
... • Bohr proposed that an electron is found only in specific circular paths, or orbits, around the nucleus. • Each orbit has a fixed energy called energy levels. ...
... • Bohr proposed that an electron is found only in specific circular paths, or orbits, around the nucleus. • Each orbit has a fixed energy called energy levels. ...
Chapter 2 Atoms, Molecules, and Ions Learning a Language Outline
... • Compare Cr2O3 to CrO3 • The ratio of Cr:O between the two compounds is a small whole number ...
... • Compare Cr2O3 to CrO3 • The ratio of Cr:O between the two compounds is a small whole number ...
Review 2 (Chapters 3,5, 10,11)
... C. Nature of electrical charge 1. Electrical charge is a fundamental property of protons and electrons 2. Species of opposite electric charge are attracted to each other 3. Species of the same electric charge repel each other 4. Species of opposite electric charge cancel to make a neutral atom ...
... C. Nature of electrical charge 1. Electrical charge is a fundamental property of protons and electrons 2. Species of opposite electric charge are attracted to each other 3. Species of the same electric charge repel each other 4. Species of opposite electric charge cancel to make a neutral atom ...
Teaching/Chemistry/Chemistry Lesson Plans 04
... of groups, periods, and the transition metals in the periodic table o In the mid-1800’s 70 elements had been discovered o Russian Dmitri Mendeleev was the first person to arrange the elements in columns so that elements with similar properties were side by side For missing elements, blanks were left ...
... of groups, periods, and the transition metals in the periodic table o In the mid-1800’s 70 elements had been discovered o Russian Dmitri Mendeleev was the first person to arrange the elements in columns so that elements with similar properties were side by side For missing elements, blanks were left ...
Metals scheme
... Distinguish between pure substances and mixtures and between elements and compounds. The structure of matter: Describe the structure of the atoms of different elements. Distinguish between an element and a compound, and a pure substance and a mixture at particle level. Chemistry and society: ...
... Distinguish between pure substances and mixtures and between elements and compounds. The structure of matter: Describe the structure of the atoms of different elements. Distinguish between an element and a compound, and a pure substance and a mixture at particle level. Chemistry and society: ...
Periodic Trends
... Unit: Periodicity Knowledge/Understanding Goals: ionization energy, electronegativity, electron affinity, atomic radius, ionic radius ...
... Unit: Periodicity Knowledge/Understanding Goals: ionization energy, electronegativity, electron affinity, atomic radius, ionic radius ...
Development of Atomic Theory
... particles were deflected instead of passing through gold foil. This led to the discovery that atoms are mostly empty space with a very dense nucleus. When he calculated the diameter, the nucleus was 100,000 times smaller than the diameter of the atom. ...
... particles were deflected instead of passing through gold foil. This led to the discovery that atoms are mostly empty space with a very dense nucleus. When he calculated the diameter, the nucleus was 100,000 times smaller than the diameter of the atom. ...
(+) = # of electrons
... •Electrons in lower numbered shells are closer to the nucleus and are lower in energy. •Electrons in higher numbered shells are further from the nucleus and are higher in energy. ...
... •Electrons in lower numbered shells are closer to the nucleus and are lower in energy. •Electrons in higher numbered shells are further from the nucleus and are higher in energy. ...
Chapter 2 - profpaz.com
... element identified by its unique atomic number, is represented by a unique chemical symbol, a one- or two-letter abbreviation. ...
... element identified by its unique atomic number, is represented by a unique chemical symbol, a one- or two-letter abbreviation. ...
PPT - George Mason University
... Certain Period 2 elements exhibit behaviors that are very similar to those of the Period 3 elements immediately below and to the right ...
... Certain Period 2 elements exhibit behaviors that are very similar to those of the Period 3 elements immediately below and to the right ...
CVB101 – Lecture 3 Chemical Bonding • Chemical bonding
... Number of protons in the nucleus determines the chemical identity of the atom Chemical properties, most importantly, chemical reactivity is determined by the electrons, more precisely, electronic structure (number of eincluding their distribution around nucleus and their energies) – explained by ...
... Number of protons in the nucleus determines the chemical identity of the atom Chemical properties, most importantly, chemical reactivity is determined by the electrons, more precisely, electronic structure (number of eincluding their distribution around nucleus and their energies) – explained by ...
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 ...
Chapter 3: Atoms and Moles By: John Pierce
... The law of definite proportions states that two of the same substances that have different sizes have the same proportions by mass. The law of conservation of mass states that mass can’t be formed or destroyed in normal chemical and physical changes. This law also states that the mass of the react ...
... The law of definite proportions states that two of the same substances that have different sizes have the same proportions by mass. The law of conservation of mass states that mass can’t be formed or destroyed in normal chemical and physical changes. This law also states that the mass of the react ...
Chapter 3
... • All compounds have the same proportion by mass for example: NaCl is always 60.66% chlorine and 39.34% sodium • Law of Multiple Proportions: when two elements can form two compounds, the masses that combine are in simple whole number ratios, CO and CO2 ...
... • All compounds have the same proportion by mass for example: NaCl is always 60.66% chlorine and 39.34% sodium • Law of Multiple Proportions: when two elements can form two compounds, the masses that combine are in simple whole number ratios, CO and CO2 ...
01 - cloudfront.net
... 16. Analyzing Processes Particle accelerators are devices that speed up charged particles in order to smash them together. Scientists use these devices to make atoms. How can scientists determine whether the atoms formed are a new element or a new isotope of a known element? ________________________ ...
... 16. Analyzing Processes Particle accelerators are devices that speed up charged particles in order to smash them together. Scientists use these devices to make atoms. How can scientists determine whether the atoms formed are a new element or a new isotope of a known element? ________________________ ...
Chemistry 2810 Answers to the Second assignment Topic: Atomic
... contraction. Data: IP of Sr = 5.695; IP of Ba = 5.211; IP of Ra = 5.278. IP of Sr = 5.695 for [Kr]5s2; IP of Ba = 5.211 for [Xe]6s2; IP of Ra = 5.278 for [Rn] 7s2. We are comparing ionizations from exactly the same valence electron configurations in each case. However, the 4f level is filled between ...
... contraction. Data: IP of Sr = 5.695; IP of Ba = 5.211; IP of Ra = 5.278. IP of Sr = 5.695 for [Kr]5s2; IP of Ba = 5.211 for [Xe]6s2; IP of Ra = 5.278 for [Rn] 7s2. We are comparing ionizations from exactly the same valence electron configurations in each case. However, the 4f level is filled between ...
1. All matter is made up of
... 3. What is the atomic mass for Argon? 4. How many electrons does an atom of H have? 5. How many neutrons are in an atom of Li? 6. How many electrons are in an atom of Si? 7. How many protons and neutrons are in an atom of Argon? ...
... 3. What is the atomic mass for Argon? 4. How many electrons does an atom of H have? 5. How many neutrons are in an atom of Li? 6. How many electrons are in an atom of Si? 7. How many protons and neutrons are in an atom of Argon? ...
Modern Physics - WordPress.com
... Bohr put the electrons into energy shells around the nucleus Chadwick discovered the neutron in the nucleus The model of the atom took 2000 years to design and we have had it about 70 years! ...
... Bohr put the electrons into energy shells around the nucleus Chadwick discovered the neutron in the nucleus The model of the atom took 2000 years to design and we have had it about 70 years! ...
ChemCh4of2011
... Conclusions from the Study of the Electron Cathode rays have identical properties regardless of the element used to produce them. All elements must contain identically charged electrons. Atoms are neutral, so there must be positive particles in the atom to balance the negative charge of the elec ...
... Conclusions from the Study of the Electron Cathode rays have identical properties regardless of the element used to produce them. All elements must contain identically charged electrons. Atoms are neutral, so there must be positive particles in the atom to balance the negative charge of the elec ...
Answer Key of worksheet (History of an Atom)
... c. Lightweight, negative electrons move in the nucleus. d. Electrons are compact together. Bohr States That Electrons Can Jump Between Levels 18. In Bohr’s atomic model, electrons travel in definite paths around the nucleus at specific levels. Each level is a certain distance from the nucleus. Elect ...
... c. Lightweight, negative electrons move in the nucleus. d. Electrons are compact together. Bohr States That Electrons Can Jump Between Levels 18. In Bohr’s atomic model, electrons travel in definite paths around the nucleus at specific levels. Each level is a certain distance from the nucleus. Elect ...
Chapter 4 Notes
... ____________________ - smallest particle of an element that retains the ____________________ of that element. ____________________ is the man credited with the discovery of the electrons in the late _____, using cathode ray tubes. ____________________ discovered the mass of the electron. Knowledge o ...
... ____________________ - smallest particle of an element that retains the ____________________ of that element. ____________________ is the man credited with the discovery of the electrons in the late _____, using cathode ray tubes. ____________________ discovered the mass of the electron. Knowledge o ...
A Few Laws • Conservation of Matter-For any
... Understand the general separation of the periodic table into metals and nonmetals and be able to list and define the characteristics of a metal Identify the positions of the alkali metals, alkaline earths and the halogens. Know how the major chemistry of these groups is predictable. Using periodic p ...
... Understand the general separation of the periodic table into metals and nonmetals and be able to list and define the characteristics of a metal Identify the positions of the alkali metals, alkaline earths and the halogens. Know how the major chemistry of these groups is predictable. Using periodic p ...
Final Exam Practice Problems Set 2
... When 50.0 mL of 0.400 M Ca(NO3)2 is added to 50.0 mL of 0.800 M NaF, CaF2 precipitates, as shown in the net ionic equation below. The initial temperature of both solutions is 21.0 ˚C. Assuming that the reaction goes to completion, and that the resulting solution has a mass of 100.00 g and a specific ...
... When 50.0 mL of 0.400 M Ca(NO3)2 is added to 50.0 mL of 0.800 M NaF, CaF2 precipitates, as shown in the net ionic equation below. The initial temperature of both solutions is 21.0 ˚C. Assuming that the reaction goes to completion, and that the resulting solution has a mass of 100.00 g and a specific ...