Answers to Selected Exercises
... density at 20°C = 1.738 g cm3; pounded into sheets; drawn into wires; good conductor. Chemical properties: burns in air; reacts with Cl2 . 1.20 (a) Chemical (b) physical (c) physical (d) chemical (e) chemical 1.21 (a) Add water to dissolve the sugar; filter this mixture, collecting the sand on filt ...
... density at 20°C = 1.738 g cm3; pounded into sheets; drawn into wires; good conductor. Chemical properties: burns in air; reacts with Cl2 . 1.20 (a) Chemical (b) physical (c) physical (d) chemical (e) chemical 1.21 (a) Add water to dissolve the sugar; filter this mixture, collecting the sand on filt ...
H - JMap
... 45 What occurs when a substance in an oxidationreduction reaction is reduced? (1) It loses electrons, and its oxidation number ...
... 45 What occurs when a substance in an oxidationreduction reaction is reduced? (1) It loses electrons, and its oxidation number ...
Identify the following properties as either - Teach-n-Learn-Chem
... chemical equation, identify reactants and product(s) and include energy). ANSWER: The paper (CxHy) was burned with oxygen and the atoms in the paper are broken apart and rearranged into new combinations. The new combinations are the products: CO2 + H2O. Carbon dioxide and water are always the produc ...
... chemical equation, identify reactants and product(s) and include energy). ANSWER: The paper (CxHy) was burned with oxygen and the atoms in the paper are broken apart and rearranged into new combinations. The new combinations are the products: CO2 + H2O. Carbon dioxide and water are always the produc ...
File
... 20. Element whose atoms lose electrons in chemical reactions to become positive ions. 21. Groups 3-12 on the periodic table. 22. Scientist who performed the gold foil experiment, and concluded that an atom must be composed of mostly empty space with a small, dense, positively-charged nucleus. 23. An ...
... 20. Element whose atoms lose electrons in chemical reactions to become positive ions. 21. Groups 3-12 on the periodic table. 22. Scientist who performed the gold foil experiment, and concluded that an atom must be composed of mostly empty space with a small, dense, positively-charged nucleus. 23. An ...
CHEM 1405 Practice Exam #2 (2015)
... A) B B) Be 7) Which fourth period transition element has the highest atomic number? A) Ca B) Cd C) Kr D) Zn C) Sb and Te D) Po and At C) Ca D) none of the above 8) Which of the following elements are fourth period metalloids? A) Si and Ge B) Ge and As 9) Which of the following is an alkali metal? A ...
... A) B B) Be 7) Which fourth period transition element has the highest atomic number? A) Ca B) Cd C) Kr D) Zn C) Sb and Te D) Po and At C) Ca D) none of the above 8) Which of the following elements are fourth period metalloids? A) Si and Ge B) Ge and As 9) Which of the following is an alkali metal? A ...
Topic 2
... negatively charged ion, called an anion (more electrons than protons). i.e, Cl– An atom that loses electrons becomes a positively charged ion, called a cation (more protons than electrons). i.e., Na+ – An ionic compound is a compound composed of cations and anions. Answer the following questions for ...
... negatively charged ion, called an anion (more electrons than protons). i.e, Cl– An atom that loses electrons becomes a positively charged ion, called a cation (more protons than electrons). i.e., Na+ – An ionic compound is a compound composed of cations and anions. Answer the following questions for ...
PHYSICAL SETTING CHEMISTRY
... 2.3 × 1014 hertz. Using your graph, estimate the energy associated with this spectral line. [1] 68 Explain, in terms of subatomic particles and energy states, why light is emitted by the hydrogen gas. [1] 69 Identify one condition not mentioned in the passage, under which hydrogen gas behaves most l ...
... 2.3 × 1014 hertz. Using your graph, estimate the energy associated with this spectral line. [1] 68 Explain, in terms of subatomic particles and energy states, why light is emitted by the hydrogen gas. [1] 69 Identify one condition not mentioned in the passage, under which hydrogen gas behaves most l ...
BSPH 111 - Refresher Chemistry
... s orbitals are spherical, whereas p orbitals are dumbbell-shaped. d orbitals and beyond are much harder to visually represent. ...
... s orbitals are spherical, whereas p orbitals are dumbbell-shaped. d orbitals and beyond are much harder to visually represent. ...
2004 NEACS Ashdown Exam 1. The allotrope of carbon shown to
... (C) A sample contains many molecules, each of which has one C O bond shorter than the other two. Averaging all of these molecules produces an average distance that is somewhat shorter that a single C O bond. (D) One C O bond is more reactive than the other two because the double bond is less stable. ...
... (C) A sample contains many molecules, each of which has one C O bond shorter than the other two. Averaging all of these molecules produces an average distance that is somewhat shorter that a single C O bond. (D) One C O bond is more reactive than the other two because the double bond is less stable. ...
Chapter 1: Quiz Review - Wetaskiwin Composite High School
... 1. What is true about the composition of one formula unit of an ionic compound, such as zinc oxide? A. The total positive charge on the cations equals the total negative charge on the anions. B. There are more positive charge C. There is more negative charge D. The charge depends upon the compound 2 ...
... 1. What is true about the composition of one formula unit of an ionic compound, such as zinc oxide? A. The total positive charge on the cations equals the total negative charge on the anions. B. There are more positive charge C. There is more negative charge D. The charge depends upon the compound 2 ...
Which notation represents an atom of sodium
... 23. Describe one chemical property of Group 1 metals that results from the atoms of each metal having only one valence electron. ...
... 23. Describe one chemical property of Group 1 metals that results from the atoms of each metal having only one valence electron. ...
Final review packet
... 11. Where are elements with similar properties found on the periodic table (in horizontal rows, or in vertical columns?) ...
... 11. Where are elements with similar properties found on the periodic table (in horizontal rows, or in vertical columns?) ...
Review 1
... made of silver but does not want it damaged during the analysis. The chemist decides to determine the density, knowing that silver has a density of 10.5 g/ml. The figurine is put into a graduated cylinder that contains 32.6 ml of water. The reading while the figurine is in the water is 60.1 ml. The ...
... made of silver but does not want it damaged during the analysis. The chemist decides to determine the density, knowing that silver has a density of 10.5 g/ml. The figurine is put into a graduated cylinder that contains 32.6 ml of water. The reading while the figurine is in the water is 60.1 ml. The ...
University of Lusaka
... s orbitals are spherical, whereas p orbitals are dumbbell-shaped. d orbitals and beyond are much harder to visually represent. ...
... s orbitals are spherical, whereas p orbitals are dumbbell-shaped. d orbitals and beyond are much harder to visually represent. ...
Final Exam Practice Questions for General Chemistry NOTICE TO
... These exact questions will not appear on your exam. These example questions are provided to you help you review the material and become familiar with the TYPES of questions that are generally presented on the final exam. This is not a complete list of the ideas, concepts, principles, or questions co ...
... These exact questions will not appear on your exam. These example questions are provided to you help you review the material and become familiar with the TYPES of questions that are generally presented on the final exam. This is not a complete list of the ideas, concepts, principles, or questions co ...
Openstax - Chemistry - Answer Key
... spheres and two purple spheres. This violates Dalton’s postulate that that atoms are not created during a chemical change, but are merely redistributed. 3. This statement violates Dalton’s fourth postulate: In a given compound, the numbers of atoms of each type (and thus also the percentage) always ...
... spheres and two purple spheres. This violates Dalton’s postulate that that atoms are not created during a chemical change, but are merely redistributed. 3. This statement violates Dalton’s fourth postulate: In a given compound, the numbers of atoms of each type (and thus also the percentage) always ...
Glossary: Chemical bonds
... of isotopic masses found in a typical terrestrial sample of the element. Atom. Compare with molecule and ion. An atom is the smallest particle of an element that retains the chemical properties of the element. Atoms are electrically neutral, with a positively charged nucleus that binds one or more e ...
... of isotopic masses found in a typical terrestrial sample of the element. Atom. Compare with molecule and ion. An atom is the smallest particle of an element that retains the chemical properties of the element. Atoms are electrically neutral, with a positively charged nucleus that binds one or more e ...
Molecular orbital diagram
A molecular orbital diagram, or MO diagram, is a qualitative descriptive tool explaining chemical bonding in molecules in terms of molecular orbital theory in general and the linear combination of atomic orbitals (LCAO) molecular orbital method in particular. A fundamental principle of these theories is that as atoms bond to form molecules, a certain number of atomic orbitals combine to form the same number of molecular orbitals, although the electrons involved may be redistributed among the orbitals. This tool is very well suited for simple diatomic molecules such as dihydrogen, dioxygen, and carbon monoxide but becomes more complex when discussing even comparatively simple polyatomic molecules, such as methane. MO diagrams can explain why some molecules exist and others do not. They can also predict bond strength, as well as the electronic transitions that can take place.