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... Protons and neutrons are found in the center of the atom, called the nucleus. The electrons move about in the electron cloud that surrounds the nucleus. 46. Which subatomic particle(s) defines the identity of the atom? Protons 47. Which subatomic particle(s) determines chemical properties? electrons ...
... Protons and neutrons are found in the center of the atom, called the nucleus. The electrons move about in the electron cloud that surrounds the nucleus. 46. Which subatomic particle(s) defines the identity of the atom? Protons 47. Which subatomic particle(s) determines chemical properties? electrons ...
CP Chemistry Midterm Study Guide
... 1. What types of properties are dependent upon the particles in a solution? 2. What is the % composition of oxygen in CO2? 3. Which part of the solution (solute or solvent) is water in an aqueous solution? 4. What is a precipitate? 5. Name and describe three types of mixtures. 6. Could you add more ...
... 1. What types of properties are dependent upon the particles in a solution? 2. What is the % composition of oxygen in CO2? 3. Which part of the solution (solute or solvent) is water in an aqueous solution? 4. What is a precipitate? 5. Name and describe three types of mixtures. 6. Could you add more ...
Chemistry Final Test 1999-2000 - Nashoba Valley Technical High
... 31) Which of the following elements is a member of the boron family and is located in period 3? A. boron (B) B. aluminum (Al) C. gallium (Ga) D. nitrogen (N) 32) Which of the following observed properties is most reliable in classifying a substance as a metal? A. poor conductor of heat B. low boilin ...
... 31) Which of the following elements is a member of the boron family and is located in period 3? A. boron (B) B. aluminum (Al) C. gallium (Ga) D. nitrogen (N) 32) Which of the following observed properties is most reliable in classifying a substance as a metal? A. poor conductor of heat B. low boilin ...
Support material for lesson planning – AS content
... The table on the following pages sets out suggested teaching times for the topics within the Chemistry A AS Level specification from 2015 (H032). This information can also be used in the context of teaching the Chemistry A A Level specification from 2015 (H432). Note that the timings are suggested o ...
... The table on the following pages sets out suggested teaching times for the topics within the Chemistry A AS Level specification from 2015 (H032). This information can also be used in the context of teaching the Chemistry A A Level specification from 2015 (H432). Note that the timings are suggested o ...
Chapter_4_Reactions_in_Aqueous_Solution
... about 0.25 g of chloride, which is a little less than half of the mass of the original sample. Therefore, the calculated percent chloride of 47.51 percent is reasonable. ...
... about 0.25 g of chloride, which is a little less than half of the mass of the original sample. Therefore, the calculated percent chloride of 47.51 percent is reasonable. ...
Unit 1: Basic Chemistry for Biology QUIZ STUDY GUIDE Things to
... -Be able to recognize whether an equation is balanced or not. -Be able to balance an equation that is unbalanced. ...
... -Be able to recognize whether an equation is balanced or not. -Be able to balance an equation that is unbalanced. ...
aq - Moodle@FCT
... about 0.25 g of chloride, which is a little less than half of the mass of the original sample. Therefore, the calculated percent chloride of 47.51 percent is reasonable. ...
... about 0.25 g of chloride, which is a little less than half of the mass of the original sample. Therefore, the calculated percent chloride of 47.51 percent is reasonable. ...
Part A Completion
... Use this completion exercise to check your understanding of the concepts and terms that are introduced in this section. Each blank can be completed with a term, short phrase, or number. The oxidation number of an element in an uncombined state ...
... Use this completion exercise to check your understanding of the concepts and terms that are introduced in this section. Each blank can be completed with a term, short phrase, or number. The oxidation number of an element in an uncombined state ...
Exam 1 Review Sheet Honors Biology This is to be used for
... table and can explain them without looking. 34. What determines how an atom reacts with other atoms (chemical reactivity)? When are atoms most stable(happy)? 35. Explain why when sodium metal is added to chlorine gas a somewhat violent explosion occurs. Be sure to include the word AFFINITY in your e ...
... table and can explain them without looking. 34. What determines how an atom reacts with other atoms (chemical reactivity)? When are atoms most stable(happy)? 35. Explain why when sodium metal is added to chlorine gas a somewhat violent explosion occurs. Be sure to include the word AFFINITY in your e ...
SampleTest3
... ____1. Which of the following reactions is both correct and balanced? A) N2 + H3 = 2NH3 B) 2H2O + CO = CO2 + 2H2 C) Zn + 2HCl = H2 + ZnCl2 D) CO + O2 = CO2 ____2. Which species would be considered a spectator ion based on the following equation? Ba2+ + 2NO3 + 2Na+ + SO42+ = BaSO4(s) + 2NO3- + 2Na+ ...
... ____1. Which of the following reactions is both correct and balanced? A) N2 + H3 = 2NH3 B) 2H2O + CO = CO2 + 2H2 C) Zn + 2HCl = H2 + ZnCl2 D) CO + O2 = CO2 ____2. Which species would be considered a spectator ion based on the following equation? Ba2+ + 2NO3 + 2Na+ + SO42+ = BaSO4(s) + 2NO3- + 2Na+ ...
Review Worksheet
... e) There are no _________ forces between gas molecules or between molecules and the sides of the container with which they collide. In a real gas, there actually is attraction between the molecules of a gas. Once again, this attraction WILL BE IGNORED when discussing ideal gases. f) Molecules collid ...
... e) There are no _________ forces between gas molecules or between molecules and the sides of the container with which they collide. In a real gas, there actually is attraction between the molecules of a gas. Once again, this attraction WILL BE IGNORED when discussing ideal gases. f) Molecules collid ...
Chemistry Final Exam Review 2006-2007
... c. Gases d. Liquids 5. The seven elements that occur as diatomic a. elements are a. H2,N2,O2,He2,Ne2,C2,Na2 b. H2,N2,O2,He2,Ne2,Cl2,Br2 c. H2,N2,O2,F2,I2,Cl2,Br2 d. Fe2,Rn2,O2,He2,Ne2,C2,Br2 6. The bond between sodium and oxygen is expected to be b. a. Gaseous b. Nonpolar covalent c. Ionic d. Polar ...
... c. Gases d. Liquids 5. The seven elements that occur as diatomic a. elements are a. H2,N2,O2,He2,Ne2,C2,Na2 b. H2,N2,O2,He2,Ne2,Cl2,Br2 c. H2,N2,O2,F2,I2,Cl2,Br2 d. Fe2,Rn2,O2,He2,Ne2,C2,Br2 6. The bond between sodium and oxygen is expected to be b. a. Gaseous b. Nonpolar covalent c. Ionic d. Polar ...
Review for test, Chapter 9
... the changes in temperature of this sample. What is the melting point of the sample and the total time required to completely melt the sample after it has reached its melting point? ...
... the changes in temperature of this sample. What is the melting point of the sample and the total time required to completely melt the sample after it has reached its melting point? ...
AP Chemistry Ch. 3 Sections 3.7-3.8 Notes Chemical Equations
... Dissolved in water (aqueous) (aq) For example, when hydrochloric acid in aqueous solution is added to solid sodium hydrogen carbonate, the products carbon dioxide gas, liquid water, and sodium chloride (which dissolves in the water) are formed: HCl (aq) + NaHCO3 (s) → CO2 (g) + H2O (l) + NaCl (aq) T ...
... Dissolved in water (aqueous) (aq) For example, when hydrochloric acid in aqueous solution is added to solid sodium hydrogen carbonate, the products carbon dioxide gas, liquid water, and sodium chloride (which dissolves in the water) are formed: HCl (aq) + NaHCO3 (s) → CO2 (g) + H2O (l) + NaCl (aq) T ...
03. The Theoretic bases of bioenergetics
... A substance which changes the speed of a reaction without being used itself is called a catalyst. The phenomenon of increasing the rate of reaction by the use of catalyst is called catalysis. If а catalyst increases (accelerates) the speed of а reaction, it is called а positive catalyst and the phen ...
... A substance which changes the speed of a reaction without being used itself is called a catalyst. The phenomenon of increasing the rate of reaction by the use of catalyst is called catalysis. If а catalyst increases (accelerates) the speed of а reaction, it is called а positive catalyst and the phen ...
Atomic Theory (2
... f. 24.6 L of CH4 g. 75.3 L of NO2 2.) Convert the following to particles (atoms, compounds, molecules, etc): a. 3.5 moles of Aluminum Phosphide b. 7.9 moles of diphosphorus pentoxide c. 1.5 moles of Carbon tetrachloride d. 5 L of Chlorine e. 15 L of Hydrogen gas f. 32 g of O2 g. 62 g of P h. 132 g o ...
... f. 24.6 L of CH4 g. 75.3 L of NO2 2.) Convert the following to particles (atoms, compounds, molecules, etc): a. 3.5 moles of Aluminum Phosphide b. 7.9 moles of diphosphorus pentoxide c. 1.5 moles of Carbon tetrachloride d. 5 L of Chlorine e. 15 L of Hydrogen gas f. 32 g of O2 g. 62 g of P h. 132 g o ...
Introduction_to_Chemical_Reactions_2011
... decreases during endothermic reactions because the system absorbs energy. The H0rxn is positive because Hfinal is more than Hinitial. In other words, the system gained energy. (sign goes with the system) Endothermic chemical reactions are generally unfavorable but may occur only if they are accompa ...
... decreases during endothermic reactions because the system absorbs energy. The H0rxn is positive because Hfinal is more than Hinitial. In other words, the system gained energy. (sign goes with the system) Endothermic chemical reactions are generally unfavorable but may occur only if they are accompa ...
30.09.2013 1 Chapter 2 Atoms and Molecules Warning!! Chapter
... • Ions with more protons than electrons are called cations. • net positive charge • Ions with more electrons that protons are called anions. • net negative charge • A monatomic ion is derived from a single atom. • A polyatomic ion is derived from a group of atoms with an overall charge. ...
... • Ions with more protons than electrons are called cations. • net positive charge • Ions with more electrons that protons are called anions. • net negative charge • A monatomic ion is derived from a single atom. • A polyatomic ion is derived from a group of atoms with an overall charge. ...
Unit 7 Packet
... When you heated sodium hydrogen carbonate, you decomposed it into sodium oxide, water vapor, and gaseous carbon dioxide. ...
... When you heated sodium hydrogen carbonate, you decomposed it into sodium oxide, water vapor, and gaseous carbon dioxide. ...
Unit 2 (Biochemistry) Review
... You should be able to tell the difference between ions and atoms, and be able to determine what type of ion is present. 3) I can compare the types of bonding between atoms to form molecules. (A.5.c) Ionic Bond Covalent Bond Metallic Bond Charge Valence Electron Oxidation Number You should be able to ...
... You should be able to tell the difference between ions and atoms, and be able to determine what type of ion is present. 3) I can compare the types of bonding between atoms to form molecules. (A.5.c) Ionic Bond Covalent Bond Metallic Bond Charge Valence Electron Oxidation Number You should be able to ...
Name ……………………………..………...… …….. Index No
... The beaker was heated until all the potassium chloride had dissolved and then allowed to cool. When crystals first appear the temperature was noted. An extra 5.0cm3 of water were added and the experiment was repeated. The results of experiment were as shown below. ...
... The beaker was heated until all the potassium chloride had dissolved and then allowed to cool. When crystals first appear the temperature was noted. An extra 5.0cm3 of water were added and the experiment was repeated. The results of experiment were as shown below. ...
19-Oct
... the mole proportions of chemical reactions. Stoichiometric ratio: The ratio of any two species (reactants or products) in a balanced chemical reaction. ...
... the mole proportions of chemical reactions. Stoichiometric ratio: The ratio of any two species (reactants or products) in a balanced chemical reaction. ...
Redox
![](https://commons.wikimedia.org/wiki/Special:FilePath/NaF.gif?width=300)
Redox reactions include all chemical reactions in which atoms have their oxidation state changed; in general, redox reactions involve the transfer of electrons between species. The term ""redox"" comes from two concepts involved with electron transfer: reduction and oxidation. It can be explained in simple terms: Oxidation is the loss of electrons or an increase in oxidation state by a molecule, atom, or ion. Reduction is the gain of electrons or a decrease in oxidation state by a molecule, atom, or ion.Although oxidation reactions are commonly associated with the formation of oxides from oxygen molecules, these are only specific examples of a more general concept of reactions involving electron transfer.Redox reactions, or oxidation-reduction reactions, have a number of similarities to acid–base reactions. Like acid–base reactions, redox reactions are a matched set, that is, there cannot be an oxidation reaction without a reduction reaction happening simultaneously. The oxidation alone and the reduction alone are each called a half-reaction, because two half-reactions always occur together to form a whole reaction. When writing half-reactions, the gained or lost electrons are typically included explicitly in order that the half-reaction be balanced with respect to electric charge.Though sufficient for many purposes, these descriptions are not precisely correct. Oxidation and reduction properly refer to a change in oxidation state — the actual transfer of electrons may never occur. The oxidation state of an atom is the fictitious charge that an atom would have if all bonds between atoms of different elements were 100% ionic. Thus, oxidation is better defined as an increase in oxidation state, and reduction as a decrease in oxidation state. In practice, the transfer of electrons will always cause a change in oxidation state, but there are many reactions that are classed as ""redox"" even though no electron transfer occurs (such as those involving covalent bonds).There are simple redox processes, such as the oxidation of carbon to yield carbon dioxide (CO2) or the reduction of carbon by hydrogen to yield methane (CH4), and more complex processes such as the oxidation of glucose (C6H12O6) in the human body through a series of complex electron transfer processes.