Covalent Bonds - WordPress.com
... • A molecule consists of two or more atoms held together by covalent bonds • A single covalent bond, or single bond, is the sharing of only one pair of valence electrons • A double covalent bond, or double bond, is the sharing of two pairs of valence electrons • The double bonds are stronger than s ...
... • A molecule consists of two or more atoms held together by covalent bonds • A single covalent bond, or single bond, is the sharing of only one pair of valence electrons • A double covalent bond, or double bond, is the sharing of two pairs of valence electrons • The double bonds are stronger than s ...
Writing Chemical Equations KClO3 O2 (g) + KCl (s) Balancing
... chloride, liquid water and gaseous carbon dioxide. Example2: Oxygen gas can be made by heating potassium chlorate in the presence of the catalyst manganese(IV) oxide. Potassium chloride is left as a solid residue. The equation would look like: ...
... chloride, liquid water and gaseous carbon dioxide. Example2: Oxygen gas can be made by heating potassium chlorate in the presence of the catalyst manganese(IV) oxide. Potassium chloride is left as a solid residue. The equation would look like: ...
Unit 7: Chemical Equations & Reactions
... • Adjust the coefficients to obtain the same number of atoms of this element on both sides. • Balance polyatomic ions as a unit (if possible). • Re-write H2O as H-OH if hydroxide is present 3. Balance the remaining atoms • End with the least-complex substance ...
... • Adjust the coefficients to obtain the same number of atoms of this element on both sides. • Balance polyatomic ions as a unit (if possible). • Re-write H2O as H-OH if hydroxide is present 3. Balance the remaining atoms • End with the least-complex substance ...
Chapter 4 - U of L Class Index
... Quantitative analysis is the identification of an unknown substance by subjecting it to chemical reactions and analyzing the resulting products. (What are they? How much of each was made?) Generally, we must already know which elements the unknown contains in order to choose the best reactions. Quan ...
... Quantitative analysis is the identification of an unknown substance by subjecting it to chemical reactions and analyzing the resulting products. (What are they? How much of each was made?) Generally, we must already know which elements the unknown contains in order to choose the best reactions. Quan ...
Serine Proteases Teaching Exercises
... e. Note: Hydrogen atoms are colored the same as the atom to which they are attached. f. Identify one atom of each coloring group. g. Make comparisons between the three enzymes in terms of atoms that are charged and atoms that are not. What do you notice about the overall content of the charged atoms ...
... e. Note: Hydrogen atoms are colored the same as the atom to which they are attached. f. Identify one atom of each coloring group. g. Make comparisons between the three enzymes in terms of atoms that are charged and atoms that are not. What do you notice about the overall content of the charged atoms ...
Chapter 4
... nucleus – the volume is about 1/10 trillionth the volume of the atom The nucleus is essentially the entire mass of the atom The nucleus is positively charged – the amount of positive charge of the nucleus balances the negative charge of the electrons The electrons move around in the empty spac ...
... nucleus – the volume is about 1/10 trillionth the volume of the atom The nucleus is essentially the entire mass of the atom The nucleus is positively charged – the amount of positive charge of the nucleus balances the negative charge of the electrons The electrons move around in the empty spac ...
Page 1 of 5 atomic structure 11/7/2012 http://castlelearning.com
... Which statement best describes an electron? 1. It has a smaller mass than a proton and a negative charge. 2. It has a smaller mass than a proton and a positive charge. 3. It has a greater mass than a proton and a negative charge. 4. It has a greater mass than a proton and a positive charge. ...
... Which statement best describes an electron? 1. It has a smaller mass than a proton and a negative charge. 2. It has a smaller mass than a proton and a positive charge. 3. It has a greater mass than a proton and a negative charge. 4. It has a greater mass than a proton and a positive charge. ...
Synthesis/Decomposition Reactions
... How do you correctly identify, balance and predict the product(s) of synthesis reactions? How do you correctly identify, balance and predict the product(s) of decomposition reactions? ...
... How do you correctly identify, balance and predict the product(s) of synthesis reactions? How do you correctly identify, balance and predict the product(s) of decomposition reactions? ...
Elements and Compounds
... • Atoms of the same element can have different masses. • They always have the same number of protons, but they can have different numbers of neutrons in their nuclei. • The difference in the number of neutrons accounts for the difference in mass. • These are isotopes of the same element ...
... • Atoms of the same element can have different masses. • They always have the same number of protons, but they can have different numbers of neutrons in their nuclei. • The difference in the number of neutrons accounts for the difference in mass. • These are isotopes of the same element ...
The Structure of the Atom
... Electrons are very small– about 1/1840 that of one proton or neutron. ...
... Electrons are very small– about 1/1840 that of one proton or neutron. ...
CHAPTER 2: ATOMS, IONS, AND COMPOUNDS
... law of definite proportions (also the law of constant composition): – A compound always has same elements in the same proportion by mass – i.e., a compound always has the same formula → Water is always H2O. law of multiple proportions: – Two or more elements can combine to form different compounds – ...
... law of definite proportions (also the law of constant composition): – A compound always has same elements in the same proportion by mass – i.e., a compound always has the same formula → Water is always H2O. law of multiple proportions: – Two or more elements can combine to form different compounds – ...
Slide 1
... contains less than the maximum number of hydrogen atoms in one or more of its fatty acid chains because some of its carbon atoms are double-bonded to each other 1) Examples: Vegetable oil, corn oil, olive oil; fats in fruits, vegetables, and fish ...
... contains less than the maximum number of hydrogen atoms in one or more of its fatty acid chains because some of its carbon atoms are double-bonded to each other 1) Examples: Vegetable oil, corn oil, olive oil; fats in fruits, vegetables, and fish ...
Chapter 3: Atoms
... particles to pass through with only a slight deflection. For most of the particles this was the case. About 1 in 8000 particles were redirected back toward the source. Rutherford said it was “as if you had fired a 15 inch shell at a piece of tissue paper and it came back and hit you!” This proved th ...
... particles to pass through with only a slight deflection. For most of the particles this was the case. About 1 in 8000 particles were redirected back toward the source. Rutherford said it was “as if you had fired a 15 inch shell at a piece of tissue paper and it came back and hit you!” This proved th ...
GY 111 Lecture Note Series Elemental Chemistry
... (although several of them were produced in labs rather than found in nature). Each has a specific chemical symbol. The elements can combine through various chemical reactions to for compounds. For example: water is H2O (one part hydrogen + 2 parts oxygen) galena is PbS (one part lead - Latin is plum ...
... (although several of them were produced in labs rather than found in nature). Each has a specific chemical symbol. The elements can combine through various chemical reactions to for compounds. For example: water is H2O (one part hydrogen + 2 parts oxygen) galena is PbS (one part lead - Latin is plum ...
Ch. 6 Biochemistry
... Organic Chemistry: the study of compounds containing carbon which is found in almost all biological molecules. 1. life on earth is considered “carbon-based” and carbon compounds lead to diversity of life on Earth. 2. carbon has 4 electrons in its outer energy level so it can form 4 covalent bonds wi ...
... Organic Chemistry: the study of compounds containing carbon which is found in almost all biological molecules. 1. life on earth is considered “carbon-based” and carbon compounds lead to diversity of life on Earth. 2. carbon has 4 electrons in its outer energy level so it can form 4 covalent bonds wi ...
Flashcards - Chemistry - Muoio-Physical-Science-Wiki
... States that the mass of all substances present before a chemical change equals the mass of all the substances remaining after the change. Mass of the reactants equal the mass of the products. ...
... States that the mass of all substances present before a chemical change equals the mass of all the substances remaining after the change. Mass of the reactants equal the mass of the products. ...
30.1 Radioactivity The atom is the smallest unit of achemical
... It is found that nuclei with mass numbers greater than about 100 spontaneously decay into other types of nuclei. Such nuclei are said to be radioactive, and there are three main types of such decays. 1- Alpha (α) decay is the spontaneous emission of an alpha particle (identical to a helium nucleus) ...
... It is found that nuclei with mass numbers greater than about 100 spontaneously decay into other types of nuclei. Such nuclei are said to be radioactive, and there are three main types of such decays. 1- Alpha (α) decay is the spontaneous emission of an alpha particle (identical to a helium nucleus) ...
Lecture 5 (2.1-2.3)
... – Hydrogen was assigned a mass of 1 (lightest) – In water: 8g O : 1g H ⇒ If the formula of water is HO, O should have relative mass of 8 ⇒ If the formula of water is H2O, O should have relative mass of 16 (16:2 = 8:1) ...
... – Hydrogen was assigned a mass of 1 (lightest) – In water: 8g O : 1g H ⇒ If the formula of water is HO, O should have relative mass of 8 ⇒ If the formula of water is H2O, O should have relative mass of 16 (16:2 = 8:1) ...
11/8/09 Chapter 3 Biochemistry Section 1 Carbon Compounds
... Explain the importance of carbon bonding in biological molecules. o A carbon atom has four electrons in its outermost energy level. Most atoms become stable when their outermost energy level contains eight electrons. A carbon atom therefore readily forms four covalent bonds with the atoms of other ...
... Explain the importance of carbon bonding in biological molecules. o A carbon atom has four electrons in its outermost energy level. Most atoms become stable when their outermost energy level contains eight electrons. A carbon atom therefore readily forms four covalent bonds with the atoms of other ...
Section 1A
... mass and positive charges of the whole atom were concentrated; the electrons occupied the remaining space in the atom, revolving around the nucleus. ...
... mass and positive charges of the whole atom were concentrated; the electrons occupied the remaining space in the atom, revolving around the nucleus. ...
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.