Types of Chemical Reactions
... 2. For each of the following reactants, use the activity series to determine whether the reaction would take place or not. If no reaction takes place, write NR in the blank. If a reaction does take place, write the formulas for the products of the reaction. (Hint: If an active metal replaces the hyd ...
... 2. For each of the following reactants, use the activity series to determine whether the reaction would take place or not. If no reaction takes place, write NR in the blank. If a reaction does take place, write the formulas for the products of the reaction. (Hint: If an active metal replaces the hyd ...
Topic 4 Chemistry of the Elements of the Main Group
... electricity. Metals make crystal lattice structures in which electrons can flow freely. Metalloids or semi-metals show intermediate conduction properties (they are semiconductors). Their electronegativity values are close to 2. The valence electrons of metalloids are localised around the nucleus but ...
... electricity. Metals make crystal lattice structures in which electrons can flow freely. Metalloids or semi-metals show intermediate conduction properties (they are semiconductors). Their electronegativity values are close to 2. The valence electrons of metalloids are localised around the nucleus but ...
Activity 9 What Determines and Limits an Atom`s Mass?
... 56. Elements with larger atomic masses become less stable. In general, elements with nuclear mass much, much less than 56 can combine to gain mass, become more stable, and give off energy. This process is called fusion. Elements with nuclear mass much, much greater than 56 can break apart to lose ma ...
... 56. Elements with larger atomic masses become less stable. In general, elements with nuclear mass much, much less than 56 can combine to gain mass, become more stable, and give off energy. This process is called fusion. Elements with nuclear mass much, much greater than 56 can break apart to lose ma ...
Final Exam - KFUPM Faculty List
... and Eea = electron affinity) A) an element with a large Ei and an element with a small negative Eea no, because the cation formation needs a large Ei and the anion formation provides only a small negative Eea B) an element with a small Ei and an element with a small negative Eea no, the cation form ...
... and Eea = electron affinity) A) an element with a large Ei and an element with a small negative Eea no, because the cation formation needs a large Ei and the anion formation provides only a small negative Eea B) an element with a small Ei and an element with a small negative Eea no, the cation form ...
Early Theories of Matter
... scientific research he conducted. The main points of Dalton’s atomic theory are shown below. Dalton’s Atomic Theory - All matter is composed of extremely small particles called atoms. - All atoms of a given element are identical, having the same size, mass, and chemical properties. Atoms of a specif ...
... scientific research he conducted. The main points of Dalton’s atomic theory are shown below. Dalton’s Atomic Theory - All matter is composed of extremely small particles called atoms. - All atoms of a given element are identical, having the same size, mass, and chemical properties. Atoms of a specif ...
Chemical Energy
... Ho = 34 kJ/mol Mg(s) + 1/2O2(g) - MgO(s) Ho = -602 kJ/mol 2 P(s) + 3 Cl2(g) - 2 PCl3(s) Ho = -640 kJ/mol 2 P(s) + 5 Cl2(g) - 2 PCl5(s) Ho = -880 kJ/mol C(graphite) + 2 O(g) - CO2(g) Ho = -643 kJ/mol C(graphite) + O2(g) - CO2(g) Ho = -394 kJ/mol C(graphite) + 2 H2(g) - CH4(g) Ho = -75 kJ/mol 2 ...
... Ho = 34 kJ/mol Mg(s) + 1/2O2(g) - MgO(s) Ho = -602 kJ/mol 2 P(s) + 3 Cl2(g) - 2 PCl3(s) Ho = -640 kJ/mol 2 P(s) + 5 Cl2(g) - 2 PCl5(s) Ho = -880 kJ/mol C(graphite) + 2 O(g) - CO2(g) Ho = -643 kJ/mol C(graphite) + O2(g) - CO2(g) Ho = -394 kJ/mol C(graphite) + 2 H2(g) - CH4(g) Ho = -75 kJ/mol 2 ...
What are atomic weights?
... one kind of atom with the "weight" of another kind of atom. On pages 153 and 185 you will see the symbol description for sulfur (S). Its ATOMIC NUMBER is 16. Its ATOMIC WEIGl-iT' i's 32,06. But how can it-be 32.06 and' not exactly 32? .After all, 16 protons plus 16 neutrons equals 32. Rightbut. \:I\ ...
... one kind of atom with the "weight" of another kind of atom. On pages 153 and 185 you will see the symbol description for sulfur (S). Its ATOMIC NUMBER is 16. Its ATOMIC WEIGl-iT' i's 32,06. But how can it-be 32.06 and' not exactly 32? .After all, 16 protons plus 16 neutrons equals 32. Rightbut. \:I\ ...
Radioactivity
... • Unlike all previously discovered chemical reactions, radioactivity sometimes results in the formation of completely new atoms. Radioactivity results from having an unstable nucleus. When these nuclei lose energy and break apart, decay occurs. Radioactive decay releases energy from the nucleu ...
... • Unlike all previously discovered chemical reactions, radioactivity sometimes results in the formation of completely new atoms. Radioactivity results from having an unstable nucleus. When these nuclei lose energy and break apart, decay occurs. Radioactive decay releases energy from the nucleu ...
2.2 The Discovery of Atomic Structure
... • Thus, isotopes have the same Z but different A. • There can be a variable number of neutrons for the same number of protons. Isotopes have the same number of protons but different numbers of neutrons. • All atoms of a specific element have the same number of protons. • Isotopes of a specific eleme ...
... • Thus, isotopes have the same Z but different A. • There can be a variable number of neutrons for the same number of protons. Isotopes have the same number of protons but different numbers of neutrons. • All atoms of a specific element have the same number of protons. • Isotopes of a specific eleme ...
2006 Practice Final Exam - Department of Chemistry | Oregon State
... There are no lone pairs of electrons. There is one lone pair of electrons. There are two lone pairs of electrons. There are three lone pairs of electrons. There are four lone pairs of electrons. ...
... There are no lone pairs of electrons. There is one lone pair of electrons. There are two lone pairs of electrons. There are three lone pairs of electrons. There are four lone pairs of electrons. ...
Electrochemistry
... -unit is the volt: 1V = 1J of work per coulomb of charge (J/coulomb) -measured with a voltmeter: -drawing of current through a known resistance -or a potentiometer: measures opposition to current (compares to a known emf) ...
... -unit is the volt: 1V = 1J of work per coulomb of charge (J/coulomb) -measured with a voltmeter: -drawing of current through a known resistance -or a potentiometer: measures opposition to current (compares to a known emf) ...
Document
... 2 H2(g)+ O2(g) → 2 H2O(g) + heat ΔH = – 483.6 kJ Characteristics of Enthalpy (1) Enthalpy is an extensive property (2) ΔH for a reaction is equal in magnitude but opposite in sign to ΔH for reverse reaction (3) ΔH for a reaction depends on states of reactants and products (gas, liquid) ...
... 2 H2(g)+ O2(g) → 2 H2O(g) + heat ΔH = – 483.6 kJ Characteristics of Enthalpy (1) Enthalpy is an extensive property (2) ΔH for a reaction is equal in magnitude but opposite in sign to ΔH for reverse reaction (3) ΔH for a reaction depends on states of reactants and products (gas, liquid) ...
Descriptive Chemistry for Midterm Exam #2
... Occurrence: found in more compounds than any other element on earth. It is the most abundant element in universe. Oxidation states: 0 in H2, +1 in compounds with other non-metals, −1 in metal hydrides. Industrial Preparation of H2: This is carried out through the reduction of +1 oxidation state in H ...
... Occurrence: found in more compounds than any other element on earth. It is the most abundant element in universe. Oxidation states: 0 in H2, +1 in compounds with other non-metals, −1 in metal hydrides. Industrial Preparation of H2: This is carried out through the reduction of +1 oxidation state in H ...
Additional Review
... o all of matter is some combination of these four elements Alchemy [1500 AD] In the 1500’s many scientists were________________________________________________ ________________________________________________________________________________________ While they were not able to create gold they did di ...
... o all of matter is some combination of these four elements Alchemy [1500 AD] In the 1500’s many scientists were________________________________________________ ________________________________________________________________________________________ While they were not able to create gold they did di ...
Chemical Bonding
... Draw valence molecular orbital diagrams (i.e. omitting inner shell orbitals) for the following homonuclear diatomic species, H2!, He2+, O2, N2!, C22!, Ne2+, (Na2, Mg2, P2, you can assume that third period diatomics form valence molecular orbitals similar to second period diatomics but with n=3) and ...
... Draw valence molecular orbital diagrams (i.e. omitting inner shell orbitals) for the following homonuclear diatomic species, H2!, He2+, O2, N2!, C22!, Ne2+, (Na2, Mg2, P2, you can assume that third period diatomics form valence molecular orbitals similar to second period diatomics but with n=3) and ...
Atomic Theory reading packet
... modern because it contained statements about atoms that could be tested experimentally. Dalton's theory had five major parts. He said: ...
... modern because it contained statements about atoms that could be tested experimentally. Dalton's theory had five major parts. He said: ...
Chemistry 40S – Exam Review
... What is a quantum of energy? What is the continuous spectrum of white light? What is the atomic emission spectrum of an element? What are the four blocks of the periodic table? Which group has the most stable electron configuration? What is it? Write orbital diagrams and complete electron configurat ...
... What is a quantum of energy? What is the continuous spectrum of white light? What is the atomic emission spectrum of an element? What are the four blocks of the periodic table? Which group has the most stable electron configuration? What is it? Write orbital diagrams and complete electron configurat ...
Multivalent Ionic Compounds
... Step 1: decide if we use Ti3+or Ti4+ and F-, note that the 4 in the compound (TiF4) crossed down from the Ti so we must have used Ti4+. Step 2: name the multivalent metal as is on the periodic table, Titanium, add the roman numeral (IV) to indicate the charge used and then add the nonmetal, changing ...
... Step 1: decide if we use Ti3+or Ti4+ and F-, note that the 4 in the compound (TiF4) crossed down from the Ti so we must have used Ti4+. Step 2: name the multivalent metal as is on the periodic table, Titanium, add the roman numeral (IV) to indicate the charge used and then add the nonmetal, changing ...
32__atom_quantum____..
... D) one half as large. E) one quarter as large. 12) A new theory conforms to the correspondence principle when it A) ties two or more theories together. B) corresponds to all theories in nature. C) updates the essence of the old theory. D) accounts for verified results of the old theory. E) none of t ...
... D) one half as large. E) one quarter as large. 12) A new theory conforms to the correspondence principle when it A) ties two or more theories together. B) corresponds to all theories in nature. C) updates the essence of the old theory. D) accounts for verified results of the old theory. E) none of t ...
The Representative Elements: Group 5A Through 8A
... Arsenic and antimony is covalent network solid with high melting points. Bismuth is the only metal in the group and it is the heaviest element that contains stable (non-radioactive) isotopes. Important Trends in The Chemical Behaviors of the Group 5A Elements Elements of Group 5A overwhelmingly form ...
... Arsenic and antimony is covalent network solid with high melting points. Bismuth is the only metal in the group and it is the heaviest element that contains stable (non-radioactive) isotopes. Important Trends in The Chemical Behaviors of the Group 5A Elements Elements of Group 5A overwhelmingly form ...
Chapter 2
... Nuclear Stability There are many factors that determine whether a particular nucleus will radioactively decay (is unstable) or not. Based on observations, the following has been observed: 1) Nuclei with an even number of both protons and neutrons are generally more stable than those with an odd num ...
... Nuclear Stability There are many factors that determine whether a particular nucleus will radioactively decay (is unstable) or not. Based on observations, the following has been observed: 1) Nuclei with an even number of both protons and neutrons are generally more stable than those with an odd num ...
Chemical changes
... Some, but not all physical changes can be reversed. You could refreeze the water into ice, but you cannot put your hair back together if you don’t like your haircut! ...
... Some, but not all physical changes can be reversed. You could refreeze the water into ice, but you cannot put your hair back together if you don’t like your haircut! ...
Ch 8 Bonding and Molecular Structure 06-Nov
... Drawing Lewis Electron Dot Structures Valence Electrons: Carbon has 4, Hydrogen has 1, Nitrogen has 5 (3 bonding and one lone pair), and Oxygen has 6 2 bonding and 2 lone pair). Draw the orbital box diagram or the spdf notation and prove it to yourself! ...
... Drawing Lewis Electron Dot Structures Valence Electrons: Carbon has 4, Hydrogen has 1, Nitrogen has 5 (3 bonding and one lone pair), and Oxygen has 6 2 bonding and 2 lone pair). Draw the orbital box diagram or the spdf notation and prove it to yourself! ...
Answers to End-of-Chapter Questions – Brooker et al ARIS site
... 1. Before the experiment conducted by Ernest Rutherford, how did many scientists envision the structure of an atom? Answer: Scientists were aware that atoms contained charged particles. Many believed that the positive charges and mass were evenly distributed throughout the atom. 2. What was the hypo ...
... 1. Before the experiment conducted by Ernest Rutherford, how did many scientists envision the structure of an atom? Answer: Scientists were aware that atoms contained charged particles. Many believed that the positive charges and mass were evenly distributed throughout the atom. 2. What was the hypo ...