Unit 10 – The Mole
... Unit 10 – The Mole Calculating Formula, Atomic, and Molecular Masses (MOLAR MASS) As you know, the mass of an element on the periodic table is a weighted average of all the naturallyoccurring isotopes of that element. Originally, we said that the unit for the mass of an element was ____________. Fro ...
... Unit 10 – The Mole Calculating Formula, Atomic, and Molecular Masses (MOLAR MASS) As you know, the mass of an element on the periodic table is a weighted average of all the naturallyoccurring isotopes of that element. Originally, we said that the unit for the mass of an element was ____________. Fro ...
Subatomic Particles (cont.)
... • Rutherford’s Gold-Foil Experiment • In 1911, Rutherford and his coworkers at the University of Manchester, England, directed a narrow beam of alpha particles at a very thin sheet of gold foil. • According to prevailing theory, the alpha particles should have passed easily through the gold, with on ...
... • Rutherford’s Gold-Foil Experiment • In 1911, Rutherford and his coworkers at the University of Manchester, England, directed a narrow beam of alpha particles at a very thin sheet of gold foil. • According to prevailing theory, the alpha particles should have passed easily through the gold, with on ...
Chapter 2 ATOMS AND ELEMENTS
... 19th century, championed by John Dalton. • Using two scientific laws discovered in the late 1700’s, Dalton built his atomic theory ...
... 19th century, championed by John Dalton. • Using two scientific laws discovered in the late 1700’s, Dalton built his atomic theory ...
physics/0010052 PDF
... The 1st law of thermodynamics in the form of (6) was obtained not strictly in [3]. In the present work a strict derivation is given. Using the result obtained in the present paper it is possible to explain a paradox in chemical thermodynamics: the heat of chemical reactions, that of dilution of liq ...
... The 1st law of thermodynamics in the form of (6) was obtained not strictly in [3]. In the present work a strict derivation is given. Using the result obtained in the present paper it is possible to explain a paradox in chemical thermodynamics: the heat of chemical reactions, that of dilution of liq ...
Introduction_to_Chemical_Reactions_2011
... thermo-chemists (see handout). • H0f = standard heat of formation for a compound (in kJ/mol). It is determined by forming the compound from its elements in their stable forms at conditions of 298K and 1 atm of pressure inside of a calorimeter. • For most compounds, H0f is negative because bond forma ...
... thermo-chemists (see handout). • H0f = standard heat of formation for a compound (in kJ/mol). It is determined by forming the compound from its elements in their stable forms at conditions of 298K and 1 atm of pressure inside of a calorimeter. • For most compounds, H0f is negative because bond forma ...
Physical Science
... share with your partner. Find the number of protons, neutrons and electrons of the following: ...
... share with your partner. Find the number of protons, neutrons and electrons of the following: ...
Chapter 1-3 Exam Review
... These were discovered by Prof. HOFBrINCl or was his name BrINClHOF? --------------------------------------------------------------------------------------------------------------------Target 6: I can write the names and formulas of ionic compounds, molecular/covalent compounds and acids. Ionic Comp ...
... These were discovered by Prof. HOFBrINCl or was his name BrINClHOF? --------------------------------------------------------------------------------------------------------------------Target 6: I can write the names and formulas of ionic compounds, molecular/covalent compounds and acids. Ionic Comp ...
2 - Del Mar College
... Electrical Energy is the movement of electrical charges. Everything is made of tiny particles called atoms. Atoms are made of even smaller particles called electrons, protons, and neutrons. Applying a force can make some of the electrons move. Electrical charges moving through a wire is called elect ...
... Electrical Energy is the movement of electrical charges. Everything is made of tiny particles called atoms. Atoms are made of even smaller particles called electrons, protons, and neutrons. Applying a force can make some of the electrons move. Electrical charges moving through a wire is called elect ...
Final Exam Review
... 29. Which of the following would not cause an increase in the volume of a gas trapped in a syringe with one atm pressure upon it? (Ch. 13) a. changing to a different gas of higher molecular weight b. heating the syringe c. increasing the amount of gas in the syringe d. a sudden, dramatic decrease i ...
... 29. Which of the following would not cause an increase in the volume of a gas trapped in a syringe with one atm pressure upon it? (Ch. 13) a. changing to a different gas of higher molecular weight b. heating the syringe c. increasing the amount of gas in the syringe d. a sudden, dramatic decrease i ...
Haley CHM2045 Final Review
... 2. A 1.0 L mixture of He, Ar, and Ne has a total pressure of 654 mmHg at 298 K. If the partial pressure of He is 378 mmHg and the partial pressure of Ne is 112 mmHg, what is the partial pressure of Ar? 3. Lithium reacts with nitrogen gas in the following reaction, 6Li + N2 —> 2Li3N What mass of lith ...
... 2. A 1.0 L mixture of He, Ar, and Ne has a total pressure of 654 mmHg at 298 K. If the partial pressure of He is 378 mmHg and the partial pressure of Ne is 112 mmHg, what is the partial pressure of Ar? 3. Lithium reacts with nitrogen gas in the following reaction, 6Li + N2 —> 2Li3N What mass of lith ...
Chemistry 20H
... A chemical change results when the atoms of one or more substances are rearranged to produce new substances with new properties. In a chemical reaction the atoms remain the same, but their arrangement changes. For instance: H2O H2 + O2 In this reaction water is broken down into two substances, oxy ...
... A chemical change results when the atoms of one or more substances are rearranged to produce new substances with new properties. In a chemical reaction the atoms remain the same, but their arrangement changes. For instance: H2O H2 + O2 In this reaction water is broken down into two substances, oxy ...
Atomic Structure - Madison Public Schools
... 2. To understand Rutherford’s experiment 3. To describe some important features of subatomic ...
... 2. To understand Rutherford’s experiment 3. To describe some important features of subatomic ...
Mass Number, A
... particles called atoms. 2. All atoms of a given element are identical (all hydrogen atoms are identical). 3. The atoms of an element are different than the atoms of another element (hydrogen is different than helium). 4. Atoms of one element can combine with the atoms of another element to make c ...
... particles called atoms. 2. All atoms of a given element are identical (all hydrogen atoms are identical). 3. The atoms of an element are different than the atoms of another element (hydrogen is different than helium). 4. Atoms of one element can combine with the atoms of another element to make c ...
Chapter 2 Atoms and Elements
... significant figures after mathematical calculations have been performed are needed. For addition and subtraction, the final answer should be reported to the same decimal place as the number with the fewest decimal places reported. For multiplication and division, the final answer should be reported ...
... significant figures after mathematical calculations have been performed are needed. For addition and subtraction, the final answer should be reported to the same decimal place as the number with the fewest decimal places reported. For multiplication and division, the final answer should be reported ...
3. Chemical changes and Structure Unit Questions
... o The ionisation energy is the energy required to remove one mole of electrons from one mole of gaseous atoms o You can have second and third ionisation energies, but note that if there is a full outer shell the atom will not want to lose another electron making the energy very high. o The general f ...
... o The ionisation energy is the energy required to remove one mole of electrons from one mole of gaseous atoms o You can have second and third ionisation energies, but note that if there is a full outer shell the atom will not want to lose another electron making the energy very high. o The general f ...
Fall Semester Review
... 45. Bromine, atomic number 35, belongs to Group 17. How many electrons does bromine have in its outermost energy level? 46. The elements in Group 1 are also known as the 47. Which block in the periodic table contains the alkali metals? 48. The most reactive group of the nonmetals is the 49. The grou ...
... 45. Bromine, atomic number 35, belongs to Group 17. How many electrons does bromine have in its outermost energy level? 46. The elements in Group 1 are also known as the 47. Which block in the periodic table contains the alkali metals? 48. The most reactive group of the nonmetals is the 49. The grou ...
![02 Atomic Structure [ppt 1MB]](http://s1.studyres.com/store/data/000821172_1-5bf1afd152b32026d524139a10b8292f-300x300.png)
02 Atomic Structure [ppt 1MB]
... that all elements are arranged in order of increasing atomic number in the Periodic Table ...
... that all elements are arranged in order of increasing atomic number in the Periodic Table ...
History of the Atom Activity
... He said you cannot cut a piece of matter infinitely, but at some point you would get the smallest piece of matter possible. Said “atomos” could not be divided any further ...
... He said you cannot cut a piece of matter infinitely, but at some point you would get the smallest piece of matter possible. Said “atomos” could not be divided any further ...
Elements (NonMetals)
... Lowest density of any chemical substance Used in blimps in 1930s but flammable Gas at room Temp B.P. –253°C (20K) and M.P.-259°C (14K) Insoluble in water: 2mL gas/ 1L of water Found in H2O, organic and biological molecules Most common element in universe H2 (H-H) isoelectronic with He H has a small ...
... Lowest density of any chemical substance Used in blimps in 1930s but flammable Gas at room Temp B.P. –253°C (20K) and M.P.-259°C (14K) Insoluble in water: 2mL gas/ 1L of water Found in H2O, organic and biological molecules Most common element in universe H2 (H-H) isoelectronic with He H has a small ...
Chapter 4 (additional powerpoint)
... • In net ionic form, all spectator ions are dropped. Both the Na+ and Cl- ions are spectator ions because they appear on both sides of the equation. The net ionic equation is: Ba2+(aq) + S2-(aq) ...
... • In net ionic form, all spectator ions are dropped. Both the Na+ and Cl- ions are spectator ions because they appear on both sides of the equation. The net ionic equation is: Ba2+(aq) + S2-(aq) ...
Various Types of RXNS
... 5. Combustion Reactions: Combustion reactions can vary a good deal as soon as one steps out of the realm of hydrocarbons but the exam seldom indulges in other combustions unless they are simple combinations like the burning of a metal in air or oxygen. For the hydrocarbon combustions, the simple rul ...
... 5. Combustion Reactions: Combustion reactions can vary a good deal as soon as one steps out of the realm of hydrocarbons but the exam seldom indulges in other combustions unless they are simple combinations like the burning of a metal in air or oxygen. For the hydrocarbon combustions, the simple rul ...