Energy Level Diagrams
... called the photoelectric effect, in which electrons (called photoelectrons because they are ejected with the aid of light) are emitted from a metal surface when light shines on it. The electrons are emitted if the light being used has a sufficiently high frequency. Not all radiation results in eject ...
... called the photoelectric effect, in which electrons (called photoelectrons because they are ejected with the aid of light) are emitted from a metal surface when light shines on it. The electrons are emitted if the light being used has a sufficiently high frequency. Not all radiation results in eject ...
Catalyst
... The mass number or atomic mass: This number tells the mass of one atom, which is approximately the sum of protons and neutrons in the nucleus, since each proton and each neutron has a mass equal to one mass unit, and the electrons ...
... The mass number or atomic mass: This number tells the mass of one atom, which is approximately the sum of protons and neutrons in the nucleus, since each proton and each neutron has a mass equal to one mass unit, and the electrons ...
Atomic Theory Magic Squares Democritus _____ Dalton _____
... 2. Made a mental model of the atom; Greek philosopher who used the word “atomos” 3. Used by Rutherford in his experiment; made of two protons and two neutrons 4. The paths in which electrons circle the nucleus according to the Bohr model 5. The positive particle in the nucleus of an atom 6. The tiny ...
... 2. Made a mental model of the atom; Greek philosopher who used the word “atomos” 3. Used by Rutherford in his experiment; made of two protons and two neutrons 4. The paths in which electrons circle the nucleus according to the Bohr model 5. The positive particle in the nucleus of an atom 6. The tiny ...
Chemistry Chapter 5 (Due Nov
... c. electrons enter orbitals of highest energy first d. electrons enter orbitals of lowest energy first ____ 24. What is the electron configuration of potassium? a. 1s 2s 2p 3s 3p 4s c. 1s 2s 3s 3p 3d b. 1s 2s 2p 3s 3p d. 1s 2s 2p 3s 3p 4s ____ 25. If three electrons are available to fill three empty ...
... c. electrons enter orbitals of highest energy first d. electrons enter orbitals of lowest energy first ____ 24. What is the electron configuration of potassium? a. 1s 2s 2p 3s 3p 4s c. 1s 2s 3s 3p 3d b. 1s 2s 2p 3s 3p d. 1s 2s 2p 3s 3p 4s ____ 25. If three electrons are available to fill three empty ...
Chapter 5
... 4. Atoms of different elements combine in simple, whole number ratios to form compounds. 5. Atoms of 2 elements may combine in different ratios to form different compounds. ...
... 4. Atoms of different elements combine in simple, whole number ratios to form compounds. 5. Atoms of 2 elements may combine in different ratios to form different compounds. ...
Exam Review Answers - hrsbstaff.ednet.ns.ca
... Alkaline Earth Metals: Shiny, silvery-white colour, highly reactive but not as reactive as the Alkali metals Halogens: The halogens are the most reactive non-metals Nobel Gases: These gases are un-reactive and almost never form compounds with other elements. 14. Describe the difference between ...
... Alkaline Earth Metals: Shiny, silvery-white colour, highly reactive but not as reactive as the Alkali metals Halogens: The halogens are the most reactive non-metals Nobel Gases: These gases are un-reactive and almost never form compounds with other elements. 14. Describe the difference between ...
Classification of Matter
... Matter that can not be broken down into simpler substances under normal lab conditions Contains only one kind of element Atom ...
... Matter that can not be broken down into simpler substances under normal lab conditions Contains only one kind of element Atom ...
Chapter 7 Electron Structure of the Atom
... • The valence level contains electrons that are highest in energy and occupy orbitals that extend further from the nucleus than those in the lower levels. • Valence electrons occupy orbitals in the valence level. All the other electrons are called core electrons, or inner electrons. ...
... • The valence level contains electrons that are highest in energy and occupy orbitals that extend further from the nucleus than those in the lower levels. • Valence electrons occupy orbitals in the valence level. All the other electrons are called core electrons, or inner electrons. ...
Elements, Isotopes, and Ions
... – Is the total mass of a certain ISOTOPE of an element. 1. How to calculate mass #: # of protons + # of neutrons = mass # 2. How to calculate # of neutrons from mass #: (Mass #) ...
... – Is the total mass of a certain ISOTOPE of an element. 1. How to calculate mass #: # of protons + # of neutrons = mass # 2. How to calculate # of neutrons from mass #: (Mass #) ...
Bohr
... Was reasonably successful at explaining Mendeleev's Periodic Table Periods result in filling an additional energy level (i.e. Na: 3 levels) A period ends when the maximum # of electrons in the valence level is reached (i.e. 2, 8, 8, 18) BUT - could only explain one-electron systems (so still more co ...
... Was reasonably successful at explaining Mendeleev's Periodic Table Periods result in filling an additional energy level (i.e. Na: 3 levels) A period ends when the maximum # of electrons in the valence level is reached (i.e. 2, 8, 8, 18) BUT - could only explain one-electron systems (so still more co ...
Name
... Protons, electrons, and neutrons are evenly distributed throughout the atom. The nucleus is made of protons, electrons, and neutrons. Electrons are located around the nucleus and occupy most of the volume. The nucleus is made of electrons and protons. ...
... Protons, electrons, and neutrons are evenly distributed throughout the atom. The nucleus is made of protons, electrons, and neutrons. Electrons are located around the nucleus and occupy most of the volume. The nucleus is made of electrons and protons. ...
The Atom
... When atoms emit alpha, beta or gamma radiation, it is undergoing a radioactive decay. Decay occurs due to instability within the nucleus. As the ratio of protons to neutrons becomes more skewed, the nucleus becomes more unstable. All isotopes with an atomic number greater than 83 are unstabl ...
... When atoms emit alpha, beta or gamma radiation, it is undergoing a radioactive decay. Decay occurs due to instability within the nucleus. As the ratio of protons to neutrons becomes more skewed, the nucleus becomes more unstable. All isotopes with an atomic number greater than 83 are unstabl ...
Text Questions from Wilbraham, et. al.
... 34. How do the elements within a group compare? they have similar chemical and physical properties 5.1 35. To explain the chemical properties of elements, we require a model that does what? describes the behavior of electrons within atoms 36. Why did Bohr change Rutherford’s model? to include new di ...
... 34. How do the elements within a group compare? they have similar chemical and physical properties 5.1 35. To explain the chemical properties of elements, we require a model that does what? describes the behavior of electrons within atoms 36. Why did Bohr change Rutherford’s model? to include new di ...
View/Open - Rice Scholarship Home
... weights 35 and 36 could have an average weight 35.45. Recent researches by Sir J. J. Thomson and F. W. Aston have shown clearly that this is the true explanation of fractional atomic weights. Chlorine is found to be a mixture of atoms of weights 35, 37 and 39; neon, a mixture of 20 and 22;magnesium, ...
... weights 35 and 36 could have an average weight 35.45. Recent researches by Sir J. J. Thomson and F. W. Aston have shown clearly that this is the true explanation of fractional atomic weights. Chlorine is found to be a mixture of atoms of weights 35, 37 and 39; neon, a mixture of 20 and 22;magnesium, ...
Questions - SMK Raja Perempuan Ipoh
... CaO (s) + CO2 (g). (a). If the carbon dioxide produced is collected at room conditions, what is its volume? (b). Calculate the mass of calcium oxide, CaO produced. [Relative atomic mass: C, 12 ; O, 16; Ca, 40. Molar volume : 24 dm3 mol 1 at room conditions] ...
... CaO (s) + CO2 (g). (a). If the carbon dioxide produced is collected at room conditions, what is its volume? (b). Calculate the mass of calcium oxide, CaO produced. [Relative atomic mass: C, 12 ; O, 16; Ca, 40. Molar volume : 24 dm3 mol 1 at room conditions] ...
Arrangement of Electrons
... type. There is only one s-orbital but there can be three p-orbitals, five d-orbitals and seven f-orbitals • Each orbital cannot accommodate more than two electrons. It can contain 0, 1 or 2 electrons - this is known as the Pauli Exclusion Principle. • Subshell energy levels increase as follows: ls < ...
... type. There is only one s-orbital but there can be three p-orbitals, five d-orbitals and seven f-orbitals • Each orbital cannot accommodate more than two electrons. It can contain 0, 1 or 2 electrons - this is known as the Pauli Exclusion Principle. • Subshell energy levels increase as follows: ls < ...
Structure of an Atom
... Atoms contain a nucleus surrounded by an electron cloud that consists of one or more energy levels. ...
... Atoms contain a nucleus surrounded by an electron cloud that consists of one or more energy levels. ...
Atomic Theories
... be a set of these molecular units. Molecules are attracted to other molecules by attractions that are called Intermolecular Attractions (attractions between molecules). In a physical change such as melting or evaporation these intermolecular attractions must be broken. Each molecule is still a molec ...
... be a set of these molecular units. Molecules are attracted to other molecules by attractions that are called Intermolecular Attractions (attractions between molecules). In a physical change such as melting or evaporation these intermolecular attractions must be broken. Each molecule is still a molec ...
File
... behaviour of atoms and their chemical and physical properties in forming new compounds. ...
... behaviour of atoms and their chemical and physical properties in forming new compounds. ...
Practice Packet
... amounts of energy and move in areas called orbitals Developed after the famous discovery that energy can behave as both waves & particles ...
... amounts of energy and move in areas called orbitals Developed after the famous discovery that energy can behave as both waves & particles ...
atom - Cloudfront.net
... • Nuclear Stability • Atoms that contain too many or two few neutrons are unstable and lose energy through radioactive decay to form a stable nucleus. • Few exist in nature—most have already decayed to stable forms. ...
... • Nuclear Stability • Atoms that contain too many or two few neutrons are unstable and lose energy through radioactive decay to form a stable nucleus. • Few exist in nature—most have already decayed to stable forms. ...
File
... Determine the oxidation number of carbon in each carbon compound in reaction 2. Your response must include both the sign and value of each oxidation number. ...
... Determine the oxidation number of carbon in each carbon compound in reaction 2. Your response must include both the sign and value of each oxidation number. ...