Chapter 2 Practice Questions
... A) Elements are made up of tiny particles called atoms. B) Atoms are not created or destroyed in chemical reactions. C) All atoms of a given element are identical. D) Atoms are indivisible in chemical reactions. E) All of these statements are true according to modern atomic theory. 4. Avogadro's hyp ...
... A) Elements are made up of tiny particles called atoms. B) Atoms are not created or destroyed in chemical reactions. C) All atoms of a given element are identical. D) Atoms are indivisible in chemical reactions. E) All of these statements are true according to modern atomic theory. 4. Avogadro's hyp ...
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... 18. At very high pressures (~ 1000 atm), the measured pressure exerted by real gases is greater than that predicted by the ideal gas equation. This is mainly because A) the volume occupied by the gas molecules themselves becomes significant. B) real gases will condense to form solids at 1000 atm pre ...
... 18. At very high pressures (~ 1000 atm), the measured pressure exerted by real gases is greater than that predicted by the ideal gas equation. This is mainly because A) the volume occupied by the gas molecules themselves becomes significant. B) real gases will condense to form solids at 1000 atm pre ...
Final Exam - W09
... Which statement is FALSE about the 5dxy orbital? (a) It has a nodal plane in the xz plane. (b) It has a nodal plane in the yz plane. (c) For an electron in the 5dxy orbital there is a higher probability of finding the electron farther from the nucleus than if it is in the 5s orbital. (d) It can hold ...
... Which statement is FALSE about the 5dxy orbital? (a) It has a nodal plane in the xz plane. (b) It has a nodal plane in the yz plane. (c) For an electron in the 5dxy orbital there is a higher probability of finding the electron farther from the nucleus than if it is in the 5s orbital. (d) It can hold ...
Unit 3 - High School Chemistry
... 2. The smallest unit of an Ionic Compound is called a “Unit Cell”. Because of the regular crystal structure of an ionic compound, they are not referred to as molecules. 3. Ionic solids are generally High Melting Points (typically 300°C to 1000°C). Since a strong force can only shatter the crystal bu ...
... 2. The smallest unit of an Ionic Compound is called a “Unit Cell”. Because of the regular crystal structure of an ionic compound, they are not referred to as molecules. 3. Ionic solids are generally High Melting Points (typically 300°C to 1000°C). Since a strong force can only shatter the crystal bu ...
Unit 7: Chemical Equations & Reactions
... “Produces,” “Forms,” or “Yields”; indicates result of reaction ...
... “Produces,” “Forms,” or “Yields”; indicates result of reaction ...
File
... 1. An atom is the smallest particle of an element that retains the properties of that element. 2. The nucleus is a small, dense region located at the center of an atom. 3. The nucleus is made up of at least one positively charged particle called a proton and usually one or more neutral particles cal ...
... 1. An atom is the smallest particle of an element that retains the properties of that element. 2. The nucleus is a small, dense region located at the center of an atom. 3. The nucleus is made up of at least one positively charged particle called a proton and usually one or more neutral particles cal ...
Two valence electrons.
... An element is composed of a single type of atoms. When elements are listed in order according to the number of protons (called the atomic number), repeating patterns of physical and chemical properties identify families of elements with similar properties. ...
... An element is composed of a single type of atoms. When elements are listed in order according to the number of protons (called the atomic number), repeating patterns of physical and chemical properties identify families of elements with similar properties. ...
Dissociation of a Diatomic Gas
... Let us consider the following simple model for a diatomic gas: a diatomic molecule consists of a pair of point-like atoms, each of mass m, separated by a rigid rod of length a. The rigid rod corresponds to the chemical bond, which requires an energy to break. Now, at any finite temperature T , we ...
... Let us consider the following simple model for a diatomic gas: a diatomic molecule consists of a pair of point-like atoms, each of mass m, separated by a rigid rod of length a. The rigid rod corresponds to the chemical bond, which requires an energy to break. Now, at any finite temperature T , we ...
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... in the center of the field. Moreover, the electrons would be like two tiny gnats buzzing around the stadium. Atoms are mostly empty space. When two atoms approach each other during a chemical reaction, their nuclei do not come close enough to interact. Of the three kinds of subatomic particles we ha ...
... in the center of the field. Moreover, the electrons would be like two tiny gnats buzzing around the stadium. Atoms are mostly empty space. When two atoms approach each other during a chemical reaction, their nuclei do not come close enough to interact. Of the three kinds of subatomic particles we ha ...
Regents Chemistry Review Questions
... 23. Draw the Lewis dot structure for magnesium bromide. 24. In an experiment, a student determined the normal boiling points of four unknown liquids. The collected data were organized into the table below. A – 9 ºC B – 31 ºC C – 80 ºC D – 100 ºC Which liquid has the weakest attractive forces between ...
... 23. Draw the Lewis dot structure for magnesium bromide. 24. In an experiment, a student determined the normal boiling points of four unknown liquids. The collected data were organized into the table below. A – 9 ºC B – 31 ºC C – 80 ºC D – 100 ºC Which liquid has the weakest attractive forces between ...
No Slide Title
... Comparison of Group 1A and 1B The metals in these two groups have similar outer electron configurations, with one electron in the outermost s orbital. Chemical properties are quite different due to difference in the ionization energy. ...
... Comparison of Group 1A and 1B The metals in these two groups have similar outer electron configurations, with one electron in the outermost s orbital. Chemical properties are quite different due to difference in the ionization energy. ...
Chapter 22-Newest-CD
... Color and Magnetism • Color of a complex depends on: (i) the metal and (ii) its oxidation state. • Pale blue [Cu(H2O)6]2+ can be converted into dark blue [Cu(NH3)6]2+ by adding NH3(aq). • A partially filled d orbital is usually required for a complex to be colored. • So, d 0 metal ions are usually ...
... Color and Magnetism • Color of a complex depends on: (i) the metal and (ii) its oxidation state. • Pale blue [Cu(H2O)6]2+ can be converted into dark blue [Cu(NH3)6]2+ by adding NH3(aq). • A partially filled d orbital is usually required for a complex to be colored. • So, d 0 metal ions are usually ...
Column A
... a. What are the atomic mass units for protons, neutrons, and electrons? Protons and neutrons = 1 amu; electrons about 0 amu What does the atomic number represent? # of protons b. What does the mass number represent? # of protons + # of neutrons c. What particles are in equal numbers in a neutral ato ...
... a. What are the atomic mass units for protons, neutrons, and electrons? Protons and neutrons = 1 amu; electrons about 0 amu What does the atomic number represent? # of protons b. What does the mass number represent? # of protons + # of neutrons c. What particles are in equal numbers in a neutral ato ...
Electronic Structure and the Periodic Table
... Things get a bit more complex where more than one electron is involved. Effective nuclear charge(kernel charge) Inner electrons act to shield outer ones from the positive charge of the nucleus. Some orbitals penetrate to the nucleus more than others: s > p > d > f ...
... Things get a bit more complex where more than one electron is involved. Effective nuclear charge(kernel charge) Inner electrons act to shield outer ones from the positive charge of the nucleus. Some orbitals penetrate to the nucleus more than others: s > p > d > f ...
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... (i) Cr2+ is reducing agent as its configuration changes from d4 to d3, (half-filled t2g3 level configuratiuon). On the other hand,Mn3+ is oxidizing becoause the change from Mn3+ to Mn2+results in the half-filled (d5) configuration which has extra stability. (ii) In this K4[Mn(CN)6],Mn is in +2 oxida ...
... (i) Cr2+ is reducing agent as its configuration changes from d4 to d3, (half-filled t2g3 level configuratiuon). On the other hand,Mn3+ is oxidizing becoause the change from Mn3+ to Mn2+results in the half-filled (d5) configuration which has extra stability. (ii) In this K4[Mn(CN)6],Mn is in +2 oxida ...
APS Practice Final 2011
... ____ 100. Whenever an object is standing still, the value(s) that is/are always zero is/are a. speed. c. momentum. b. velocity. d. All of the above ____ 101. A 10.0 kg dog chasing a rabbit north at 6.0 m/s has a momentum of a. 0.6 kg • m/s. c. 60.0 m/s. b. 60.0 kg • m/s north. d. 60.0 kg/s. ____ 102 ...
... ____ 100. Whenever an object is standing still, the value(s) that is/are always zero is/are a. speed. c. momentum. b. velocity. d. All of the above ____ 101. A 10.0 kg dog chasing a rabbit north at 6.0 m/s has a momentum of a. 0.6 kg • m/s. c. 60.0 m/s. b. 60.0 kg • m/s north. d. 60.0 kg/s. ____ 102 ...
Measurements/Unit Cancellation/Significant Figures 1. When
... 1. What is the formula for frequency? 2. What is the formula for energy? 3. What kind of wave carries the most energy? 4. What is the visible light spectrum? 5. What are the levels called that electrons get excited to? 6. What are the four subshell letters? 7. What are the quantum levels? 8. How man ...
... 1. What is the formula for frequency? 2. What is the formula for energy? 3. What kind of wave carries the most energy? 4. What is the visible light spectrum? 5. What are the levels called that electrons get excited to? 6. What are the four subshell letters? 7. What are the quantum levels? 8. How man ...
An Overview of Organic Reactions
... In an organic reaction, we see the transformation that has occurred. The mechanism describes the steps behind the changes that we can observe Reactions occur in defined steps that lead from reactant to product ...
... In an organic reaction, we see the transformation that has occurred. The mechanism describes the steps behind the changes that we can observe Reactions occur in defined steps that lead from reactant to product ...
Section 3.6
... 16. (a) Dimes were shipped out of the country because it is illegal to deface or alter Canadian currency in Canada. (b) These metals have very different magnetic properties, which could be used to separate them. (c) A magnet should separate these coins easily, because nickel is ferromagnetic (strong ...
... 16. (a) Dimes were shipped out of the country because it is illegal to deface or alter Canadian currency in Canada. (b) These metals have very different magnetic properties, which could be used to separate them. (c) A magnet should separate these coins easily, because nickel is ferromagnetic (strong ...
valence electrons
... show chemical bonds • Only involves valence electrons • Consists of the elements symbol, which represents the innermost electrons too, and the valence electrons surrounding it. • Example: Lithium has 3 electrons but only 1 valence----Li • The number of valence electrons determines how many and what ...
... show chemical bonds • Only involves valence electrons • Consists of the elements symbol, which represents the innermost electrons too, and the valence electrons surrounding it. • Example: Lithium has 3 electrons but only 1 valence----Li • The number of valence electrons determines how many and what ...
Sample Exam 1 Key
... a) What is the relationship between Atom 1 and Atom 3? (One word is sufficient.) Isotopes b) Write each of the atoms above in the shorthand notation that describes the most common isotope of hydrogen as H-1. Atom 1: Be-8 ...
... a) What is the relationship between Atom 1 and Atom 3? (One word is sufficient.) Isotopes b) Write each of the atoms above in the shorthand notation that describes the most common isotope of hydrogen as H-1. Atom 1: Be-8 ...
Atomic Concepts
... 3. Carbon can bond to one another with a single, double or triple bond (must have 4 bonds) 4. Table P- # of carbons with prefix 5. Hydrocarbon- compound that contain carbon and hydrogen only 6. Saturated hydrocarbon- (table Q) alkanes; CnH2n+2; all single bonds 7. Unsaturated hydrocarbons- (table Q) ...
... 3. Carbon can bond to one another with a single, double or triple bond (must have 4 bonds) 4. Table P- # of carbons with prefix 5. Hydrocarbon- compound that contain carbon and hydrogen only 6. Saturated hydrocarbon- (table Q) alkanes; CnH2n+2; all single bonds 7. Unsaturated hydrocarbons- (table Q) ...
First Year - WordPress.com
... Q. 28. A 50.00 mL sample of a cough mixture prepared by a pharmacist was found to have a mass of 46.0g. what is the density (in g/mL) of this mixture. Stated to the correct number of ...
... Q. 28. A 50.00 mL sample of a cough mixture prepared by a pharmacist was found to have a mass of 46.0g. what is the density (in g/mL) of this mixture. Stated to the correct number of ...
Chapter 2
... – Are numbered with Roman numeral and letter – (or just numbered with a number) • Main-group elements (labeled with A) • Transition elements (labeled with B) • Inner transition elements (shown below rest of table) ...
... – Are numbered with Roman numeral and letter – (or just numbered with a number) • Main-group elements (labeled with A) • Transition elements (labeled with B) • Inner transition elements (shown below rest of table) ...
Resonance (chemistry)
In chemistry, resonance or mesomerism is a way of describing delocalized electrons within certain molecules or polyatomic ions where the bonding cannot be expressed by one single Lewis formula. A molecule or ion with such delocalized electrons is represented by several contributing structures (also called resonance structures or canonical forms).Each contributing structure can be represented by a Lewis structure, with only an integer number of covalent bonds between each pair of atoms within the structure. Several Lewis structures are used collectively to describe the actual molecular structure, which is an approximate intermediate between the canonical forms called a resonance hybrid. Contributing structures differ only in the position of electrons, not in the position of nuclei.Electron delocalization lowers the potential energy of the substance and thus makes it more stable than any of the contributing structures. The difference between the potential energy of the actual structure and that of the contributing structure with the lowest potential energy is called the resonance energy or delocalization energy.Resonance is distinguished from tautomerism and conformational isomerism, which involve the formation of isomers, thus the rearrangement of the nuclear positions.