chapter 5 Radioactivity
... of radioactive atoms decreases. To calculate the activity, we must take the change in the number of radioactive atoms, ΔN, and divide it by the time it took that change to occur, Δt. The number of disintegrations per second that occurs in any given sample is proportional to the original number of ra ...
... of radioactive atoms decreases. To calculate the activity, we must take the change in the number of radioactive atoms, ΔN, and divide it by the time it took that change to occur, Δt. The number of disintegrations per second that occurs in any given sample is proportional to the original number of ra ...
UNIT 2 – Chemical Quantities
... O2) would occur. CO2 is removed using the following chemical reaction: CO2(g) + 2LiOH(s) Li2CO3(g) + H2O(g) . If an astronaut produces 1.50x103 g of CO2 a day, what mass of LiOH would be needed per day? ...
... O2) would occur. CO2 is removed using the following chemical reaction: CO2(g) + 2LiOH(s) Li2CO3(g) + H2O(g) . If an astronaut produces 1.50x103 g of CO2 a day, what mass of LiOH would be needed per day? ...
Atomic Concepts and Nuclear Chemistry Regents Review Page 1 A
... with alpha particles. Almost all the alpha particles passed straight through the foil. Only a few alpha particles were deflected from their original paths. 78. Explain, in terms of charged particles, why some of the alpha particles were deflected. ...
... with alpha particles. Almost all the alpha particles passed straight through the foil. Only a few alpha particles were deflected from their original paths. 78. Explain, in terms of charged particles, why some of the alpha particles were deflected. ...
Chapter 2 Name___________________________________
... C) All of the reactants have been converted to the products of the reaction. D) All of the products have been converted to the reactants of the reaction. E) The concentration of the reactants equals the concentration of the products. ...
... C) All of the reactants have been converted to the products of the reaction. D) All of the products have been converted to the reactants of the reaction. E) The concentration of the reactants equals the concentration of the products. ...
File - Mrs. Hille`s FunZone
... Werner Heisenberg German physicist You can never know the speed and position of an electron at the same time. Developed the Heisenberg Uncertainty Principle. ...
... Werner Heisenberg German physicist You can never know the speed and position of an electron at the same time. Developed the Heisenberg Uncertainty Principle. ...
Functional Groups
... Phenols: benzene rings in which one hydrogen is replaced with an OH functional group. Ketones: contain a carbonyl group (C=O) that occurs in the alkane molecule bonded to two other carbon atoms. Carboxyl acids: organic acids that contain a hydroxyl group attached to a carbonyl group. (-COOH). ...
... Phenols: benzene rings in which one hydrogen is replaced with an OH functional group. Ketones: contain a carbonyl group (C=O) that occurs in the alkane molecule bonded to two other carbon atoms. Carboxyl acids: organic acids that contain a hydroxyl group attached to a carbonyl group. (-COOH). ...
Topic 4: Classifying Elements What did the early chemists use to
... We usually refer to compounds containing HYDROGEN by their COMMON name. All compounds containing hydrogen are MOLECULAR compounds. How do we indicate the physical state of a compound? (something is writte ...
... We usually refer to compounds containing HYDROGEN by their COMMON name. All compounds containing hydrogen are MOLECULAR compounds. How do we indicate the physical state of a compound? (something is writte ...
Chapter 2 Atoms, Molecules and Ions
... they are given a negative charge. When a drop is perfectly balanced, the weight of the drop is equal to the electrostatic force of attraction between the drop and the positive plate. Using this experiment, Millikan determined the charge on the electron to be 1.60 10-19 C. ...
... they are given a negative charge. When a drop is perfectly balanced, the weight of the drop is equal to the electrostatic force of attraction between the drop and the positive plate. Using this experiment, Millikan determined the charge on the electron to be 1.60 10-19 C. ...
Matter Classification
... just salt and just water by themselves. Salt water conducts electricity while pure water does not. ...
... just salt and just water by themselves. Salt water conducts electricity while pure water does not. ...
2013 atoms
... Democritus, a Greek philosopher Democritus expressed the belief that all matter is composed of very small, indivisible particles, which he named atomos. ...
... Democritus, a Greek philosopher Democritus expressed the belief that all matter is composed of very small, indivisible particles, which he named atomos. ...
Bio 6B Lecture Slides - B
... •Energy is often converted from one form into another: (e.g., light energy into chemical energy; chemical enegy into kinetic energy; kinetic energy into heat energy; etc.) ...
... •Energy is often converted from one form into another: (e.g., light energy into chemical energy; chemical enegy into kinetic energy; kinetic energy into heat energy; etc.) ...
Chapter 1: Matter, Measurement and Problem Solving
... 1. composed of one carbon atom and one oxygen atom 2. colorless, odorless gas 3. burns with a blue flame 4. binds to hemoglobin ...
... 1. composed of one carbon atom and one oxygen atom 2. colorless, odorless gas 3. burns with a blue flame 4. binds to hemoglobin ...
1 Packet #3 Mass Relationships in Chemical Reactions How is
... When you look at a periodic table, Carbon will not have an atomic mass of 12.00 amu. ...
... When you look at a periodic table, Carbon will not have an atomic mass of 12.00 amu. ...
06The Chemistry of Life
... down into simpler chemical substances. Chemical elements combine in different ways to form a variety of substances useful to living things. ...
... down into simpler chemical substances. Chemical elements combine in different ways to form a variety of substances useful to living things. ...
4.1Atoms and Isotopes
... Tin (Sn) has the most isotopes of any element at 10 Many isotopes are radioactive (unstable nucleus that will eventually break apart and release energy in sometimes harmful forms – eg. Gamma rays) Any isotope with an atomic number greater than 82 is radioactive ...
... Tin (Sn) has the most isotopes of any element at 10 Many isotopes are radioactive (unstable nucleus that will eventually break apart and release energy in sometimes harmful forms – eg. Gamma rays) Any isotope with an atomic number greater than 82 is radioactive ...
Unit 3 – Atomic Theory
... (fission = splitting). In this reaction, certain specific elements have their nuclei broken down into smaller parts. This reaction releases a tremendous amount of energy, which can be used for an explosion (nuclear weaponry), or to power and electric generator (nuclear reactor). ...
... (fission = splitting). In this reaction, certain specific elements have their nuclei broken down into smaller parts. This reaction releases a tremendous amount of energy, which can be used for an explosion (nuclear weaponry), or to power and electric generator (nuclear reactor). ...
File
... a. demonstrate an understanding of the terms atom, element, ion, molecule, compound, empirical and molecular formulae b. write balanced equations (full and ionic) for simple reactions, including the use of state symbols c. demonstrate an understanding of the terms relative atomic mass, amount of sub ...
... a. demonstrate an understanding of the terms atom, element, ion, molecule, compound, empirical and molecular formulae b. write balanced equations (full and ionic) for simple reactions, including the use of state symbols c. demonstrate an understanding of the terms relative atomic mass, amount of sub ...
Chemical Reactions
... Discuss • What if there was no combustion reaction? What would be different in your life? • What would be an alternative to using the ...
... Discuss • What if there was no combustion reaction? What would be different in your life? • What would be an alternative to using the ...
Atoms
... particles called atoms. Atoms of a given element are identical in size, mass, and other properties; atoms of different elements differ in size, mass, and other properties. Atoms cannot be subdivided, created, or destroyed. Atoms of different elements combine in simple whole-number ratios to form che ...
... particles called atoms. Atoms of a given element are identical in size, mass, and other properties; atoms of different elements differ in size, mass, and other properties. Atoms cannot be subdivided, created, or destroyed. Atoms of different elements combine in simple whole-number ratios to form che ...
1.1.4 Amount of Substance / The Mole
... the Avogadro constant. • Define and use the term molar mass. ...
... the Avogadro constant. • Define and use the term molar mass. ...
Document
... One way of producing O2(g) involves the decomposition of potassium chlorate into potassium chloride and oxygen gas. A 25.5 g sample of Potassium chlorate is decomposed. How many moles of O2(g) are produced? How many grams of potassium chloride? How many grams of oxygen? ...
... One way of producing O2(g) involves the decomposition of potassium chlorate into potassium chloride and oxygen gas. A 25.5 g sample of Potassium chlorate is decomposed. How many moles of O2(g) are produced? How many grams of potassium chloride? How many grams of oxygen? ...
3 chemical foundations: elements, atoms and ions
... hand, some other elements are chemical combinations of two atoms of the same element. These are the diatomic elements and include hydrogen (H2), nitrogen (N2), oxygen (O2), fluorine (F2), chlorine(Cl2), bromine (Br2) and iodine(I2). Note that of these seven diatomic elements, five are gases. Of the ...
... hand, some other elements are chemical combinations of two atoms of the same element. These are the diatomic elements and include hydrogen (H2), nitrogen (N2), oxygen (O2), fluorine (F2), chlorine(Cl2), bromine (Br2) and iodine(I2). Note that of these seven diatomic elements, five are gases. Of the ...
Honors Chemistry Name Julien Period _____ Date Atoms and
... a. All matter is made up of tiny particles called atoms. Honors Chemistry ...
... a. All matter is made up of tiny particles called atoms. Honors Chemistry ...
PowerPoint - Balancing Equations
... – Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken – Chemical reactions involve changes in matter, the making of new materials with new properties, and energy changes. – Symbols represent elements, formulas describe compounds, chemical equations describe ...
... – Chemical reactions occur when bonds between the outermost parts of atoms are formed or broken – Chemical reactions involve changes in matter, the making of new materials with new properties, and energy changes. – Symbols represent elements, formulas describe compounds, chemical equations describe ...
Isotopic labeling
Isotopic labeling (or isotopic labelling) is a technique used to track the passage of an isotope, or an atom with a variation, through a reaction, metabolic pathway, or cell. The reactant is 'labeled' by replacing specific atoms by their isotope. The reactant is then allowed to undergo the reaction. The position of the isotopes in the products is measured to determine the sequence the isotopic atom followed in the reaction or the cell's metabolic pathway. The nuclides used in isotopic labeling may be stable nuclides or radionuclides. In the latter case, the labeling is called radiolabeling.In isotopic labeling, there are multiple ways to detect the presence of labeling isotopes; through their mass, vibrational mode, or radioactive decay. Mass spectrometry detects the difference in an isotope's mass, while infrared spectroscopy detects the difference in the isotope's vibrational modes. Nuclear magnetic resonance detects atoms with different gyromagnetic ratios. The radioactive decay can be detected through an ionization chamber or autoradiographs of gels.An example of the use of isotopic labeling is the study of phenol (C6H5OH) in water by replacing common hydrogen (protium) with deuterium (deuterium labeling). Upon adding phenol to deuterated water (water containing D2O in addition to the usual H2O), the substitution of deuterium for the hydrogen is observed in phenol's hydroxyl group (resulting in C6H5OD), indicating that phenol readily undergoes hydrogen-exchange reactions with water. Only the hydroxyl group was affected, indicating that the other 5 hydrogen atoms did not participate in these exchange reactions.