video slide
... Atoms -- differ in number of subatomic particles atomic number -- number of protons mass number -- protons + neutrons atomic mass -- approximated by the mass number (mass number + electrons) ...
... Atoms -- differ in number of subatomic particles atomic number -- number of protons mass number -- protons + neutrons atomic mass -- approximated by the mass number (mass number + electrons) ...
Chemistry Nomenclature Notes
... 3. Groups (or families): vertical columns that have similar properties. 4. Periods: horizontal rows which indicate the number of electron shells an atom has. Example : Calcium: ...
... 3. Groups (or families): vertical columns that have similar properties. 4. Periods: horizontal rows which indicate the number of electron shells an atom has. Example : Calcium: ...
Document
... same mass but opposite charges. Leptons and quarks have anti-particles. Bosons do not have anti-particles. ...
... same mass but opposite charges. Leptons and quarks have anti-particles. Bosons do not have anti-particles. ...
Atomic Structure
... Rutherford’s •1908 Model •Discovered that atoms have dense, positively charged nucleus •Fired charged particles at gold foil, some went through while others were deflected. ...
... Rutherford’s •1908 Model •Discovered that atoms have dense, positively charged nucleus •Fired charged particles at gold foil, some went through while others were deflected. ...
Document
... A) alkali metals have the lowest ionization energy B) alkali metals have the highest ionization energy C) halogens metals have the lowest ionization energy D) inert gases metals have the lowest ionization energy ...
... A) alkali metals have the lowest ionization energy B) alkali metals have the highest ionization energy C) halogens metals have the lowest ionization energy D) inert gases metals have the lowest ionization energy ...
Atoms and the Periodic Table
... • Explain why some atoms gain or lose electrons to form ions. • Determine how many protons, neutrons, and electrons an atom has, given its’ symbol, atomic number, and mass number • Describe how the abundance of isotopes affects an element’s average atomic mass. ...
... • Explain why some atoms gain or lose electrons to form ions. • Determine how many protons, neutrons, and electrons an atom has, given its’ symbol, atomic number, and mass number • Describe how the abundance of isotopes affects an element’s average atomic mass. ...
Periodicity - Teach-n-Learn-Chem
... State the periodic law. Explain why elements in the same family of the periodic table have similar properties. Describe the characteristics of the alkali metals, alkaline-earth metals, transition metals, actinides, lanthanides, halogens, and noble gases. Relate the properties of various elemen ...
... State the periodic law. Explain why elements in the same family of the periodic table have similar properties. Describe the characteristics of the alkali metals, alkaline-earth metals, transition metals, actinides, lanthanides, halogens, and noble gases. Relate the properties of various elemen ...
The format of this test is MULTIPLE CHOICE
... 5. How does an atom’s position on the periodic table provide information on that atom’s size (atomic radius)? The farther left in the period, the larger the atom, the further down a group it is, the larger it is. 6. What is electronegativity and why do nonmetals have high values for it? How attracti ...
... 5. How does an atom’s position on the periodic table provide information on that atom’s size (atomic radius)? The farther left in the period, the larger the atom, the further down a group it is, the larger it is. 6. What is electronegativity and why do nonmetals have high values for it? How attracti ...
1020 Chapter 4 Lecture Notes
... Contemporary view of the atom is a dynamic high-energy nucleus surrounded by a dynamic electron cloud. Electrons in the cloud have no specific location but have various specific energies. The gain, loss or sharing of electrons allows atoms to combine in small whole number ratios to create chemical c ...
... Contemporary view of the atom is a dynamic high-energy nucleus surrounded by a dynamic electron cloud. Electrons in the cloud have no specific location but have various specific energies. The gain, loss or sharing of electrons allows atoms to combine in small whole number ratios to create chemical c ...
The format of this test is MULTIPLE CHOICE
... 5. __freezing___ changes a liquid into a solid. 6. A mixture is made up of 2 or more substances that are physically combined (and can be separated). 7. When a liquid becomes a gas, __evaporation_____ occurs. 8. A mixture that is uniform (evenly spread) throughout the sample is said to be _homogenous ...
... 5. __freezing___ changes a liquid into a solid. 6. A mixture is made up of 2 or more substances that are physically combined (and can be separated). 7. When a liquid becomes a gas, __evaporation_____ occurs. 8. A mixture that is uniform (evenly spread) throughout the sample is said to be _homogenous ...
CHEM_Review - Kenston Local Schools
... Atoms that have the same number of protons and electrons are elect ically neutral. However, atoms may gain or lose electrons during chemical reactions. This creates an imbalance of negative and positive charges. Atoms may have a negative charge because they have gained extra electrons. Such atoms ar ...
... Atoms that have the same number of protons and electrons are elect ically neutral. However, atoms may gain or lose electrons during chemical reactions. This creates an imbalance of negative and positive charges. Atoms may have a negative charge because they have gained extra electrons. Such atoms ar ...
AP Semester I Review: Free Response Questions
... (a) Which element is most metallic in character? Explain your reasoning. ...
... (a) Which element is most metallic in character? Explain your reasoning. ...
AP - 02 - Atoms Molecules and Ions
... o Democritus (400 B.C.) was a Greek philosopher who came up with the first concept of the atom (atomos – indivisible) o Plato and Aristotle did not believe in atoms (no limit to how small you could divide matter) o John Dalton (1803 – 1807) came up with the modern atomic theory Each element is com ...
... o Democritus (400 B.C.) was a Greek philosopher who came up with the first concept of the atom (atomos – indivisible) o Plato and Aristotle did not believe in atoms (no limit to how small you could divide matter) o John Dalton (1803 – 1807) came up with the modern atomic theory Each element is com ...
Atoms, Isotopes, and Ions
... neutrons are in an atom, you can also figure out its mass. In this skill sheet, you will learn about isotopes, which are atoms that have the same number of protons but different numbers of neutrons. You will also learn about ions, which are atoms that have the same number of protons and different nu ...
... neutrons are in an atom, you can also figure out its mass. In this skill sheet, you will learn about isotopes, which are atoms that have the same number of protons but different numbers of neutrons. You will also learn about ions, which are atoms that have the same number of protons and different nu ...
Atomic mass
... b. look up the average atomic mass for the element and round to the nearest .5 amu. 2. Calculate the total mass of each element present by multiplying the number of atoms of an element by the element’s average atomic mass. 3. Calculate the total mass of the molecule by adding the total masses of all ...
... b. look up the average atomic mass for the element and round to the nearest .5 amu. 2. Calculate the total mass of each element present by multiplying the number of atoms of an element by the element’s average atomic mass. 3. Calculate the total mass of the molecule by adding the total masses of all ...
PPT Slides
... Electrons move around the nucleus very quickly. Scientists have found that it is not possible to determine the exact position of any single electron in an atom because they are moving too fast. This is why we picture electrons as a cloud around the nucleus. ...
... Electrons move around the nucleus very quickly. Scientists have found that it is not possible to determine the exact position of any single electron in an atom because they are moving too fast. This is why we picture electrons as a cloud around the nucleus. ...
KEY Review Sheet: UNIT TWO TEST HISTORY OF ATOM
... Pauli Exclusion Principle is violated because in the 2p orbital, there are two electrons with the same spin. The two electrons should have opposite spins (one up arrow and one down arrow) Hund’s Rule is violated because in the 3p orbital there should not be two electrons. You should not give a singl ...
... Pauli Exclusion Principle is violated because in the 2p orbital, there are two electrons with the same spin. The two electrons should have opposite spins (one up arrow and one down arrow) Hund’s Rule is violated because in the 3p orbital there should not be two electrons. You should not give a singl ...
Chapter 5 The Structure of the Atom
... 2. A particle of matter smaller than the atom had to exist. 3. The atom was divisible. 4. Called the negatively particles “corpuscles” (now called electrons) 5. Since the gas was known to be neutral, there had to be positive charged particles in the gas. ...
... 2. A particle of matter smaller than the atom had to exist. 3. The atom was divisible. 4. Called the negatively particles “corpuscles” (now called electrons) 5. Since the gas was known to be neutral, there had to be positive charged particles in the gas. ...
Introduction to the Atom
... Based on the understanding of how electrons do not orbit around the nucleus like planets around the sun. Electrons can be found in a cloud which surrounds the nucleus in a unpredictable manner. The electron cloud is a visual model. The electrons movement is related to the energy level of the electro ...
... Based on the understanding of how electrons do not orbit around the nucleus like planets around the sun. Electrons can be found in a cloud which surrounds the nucleus in a unpredictable manner. The electron cloud is a visual model. The electrons movement is related to the energy level of the electro ...
Unit 1 Atoms and Periodic Table Intro Periodic Table Notes
... • electrons located in the valence shell • # of valence e- will determine the reactivity of the atom. • The more Valence e’s the more stable and HAPPY (Noble Gases) • The less valence e’s the more reactive and EXPLOSIVE or ...
... • electrons located in the valence shell • # of valence e- will determine the reactivity of the atom. • The more Valence e’s the more stable and HAPPY (Noble Gases) • The less valence e’s the more reactive and EXPLOSIVE or ...
Chemistry Unit Objectives 2.1a Recognize that the Periodic Table is
... atomic mass of common elements. -Use the periodic table to get information about an element (isotope) including the element’s atomic number, mass number, number of neutrons in an isotope and the number of valence electrons. -Describe the general trends of reactivity and mass found in the periodic ta ...
... atomic mass of common elements. -Use the periodic table to get information about an element (isotope) including the element’s atomic number, mass number, number of neutrons in an isotope and the number of valence electrons. -Describe the general trends of reactivity and mass found in the periodic ta ...
Electron orbitals imaginary
... call the “closing of the periods”—that is why the periods end, in the sense of achieving a full-shell configuration, at atomic numbers 2, 10, 18, 36, 54, and so forth. This is a separate question from the closing of the shells. For example, if the shells were to fill sequentially, Pauli’s scheme wou ...
... call the “closing of the periods”—that is why the periods end, in the sense of achieving a full-shell configuration, at atomic numbers 2, 10, 18, 36, 54, and so forth. This is a separate question from the closing of the shells. For example, if the shells were to fill sequentially, Pauli’s scheme wou ...