Chapter 2 Review - Garnet Valley School District
... Macromolecules Many of the carbon molecules in living things are so large they are called macromolecules. Macromolecules form by polymerization, in which smaller units called monomers join together to form polymers. Biochemists sort the macromolecules in living things into groups based on their chem ...
... Macromolecules Many of the carbon molecules in living things are so large they are called macromolecules. Macromolecules form by polymerization, in which smaller units called monomers join together to form polymers. Biochemists sort the macromolecules in living things into groups based on their chem ...
CHEMISTRY
... become IONS- they have a charge. Ex. a Hydrogen atom that loses it’s electron is called a hydrogen ion, H+, or a proton. ...
... become IONS- they have a charge. Ex. a Hydrogen atom that loses it’s electron is called a hydrogen ion, H+, or a proton. ...
Group IV Elements
... Si, Ge, Sn,Pb Si most abundant element in Nature afdter O Ge, Sn, Pb are rare elements Sn,Pb have been known since long time, because they can be just melted out of their minerals Ge was discovered after its existance has been predicted. It is purified from coal and zinc ore concentrates ...
... Si, Ge, Sn,Pb Si most abundant element in Nature afdter O Ge, Sn, Pb are rare elements Sn,Pb have been known since long time, because they can be just melted out of their minerals Ge was discovered after its existance has been predicted. It is purified from coal and zinc ore concentrates ...
Midterm Review 1
... The midterm exam covers chapters 1 - 8 & 10. You should read through each chapter, look over old tests you still have, answer the following questions and do the calculations in order prepare yourself for the mid-term. 1. Define the following terms and describe where each is located. proton - ...
... The midterm exam covers chapters 1 - 8 & 10. You should read through each chapter, look over old tests you still have, answer the following questions and do the calculations in order prepare yourself for the mid-term. 1. Define the following terms and describe where each is located. proton - ...
PP Ch_ 2-3 Modified - Maria Regina High School
... some are used for transport around an organism The Shape of a protein is incredibly important ...
... some are used for transport around an organism The Shape of a protein is incredibly important ...
Carbon Isotope Fractionation by Autotrophic Bacteria with Three
... the follow ing bacteria were determined ( C 0 2 fixation pathway suggested or proven in paren theses): A lkaligenes eutrophus (reductive pentose phosphate cycle), D esulfobacterium autotrophicum and A cetobacterium w oodii (reductive acetyl-C oA pathway), D esulfobacter hydrogenophilus and T herm o ...
... the follow ing bacteria were determined ( C 0 2 fixation pathway suggested or proven in paren theses): A lkaligenes eutrophus (reductive pentose phosphate cycle), D esulfobacterium autotrophicum and A cetobacterium w oodii (reductive acetyl-C oA pathway), D esulfobacter hydrogenophilus and T herm o ...
Writing Chemical Equations
... equation in which the formulas for reacting substances (reactants) are written to the left. An arrow separates these from the formulas for products. • 2Al(s) + 3Br2(l) → 2 AlBr3(s) ...
... equation in which the formulas for reacting substances (reactants) are written to the left. An arrow separates these from the formulas for products. • 2Al(s) + 3Br2(l) → 2 AlBr3(s) ...
the tasks for those beginning
... A periodic table can give you the proton / atomic number of an element, this also tells you how many electrons are in the atom. You will have used the rule of electrons shell filling, where: The first shell holds up to 2 electrons, the second up to 8, the third up to 8 and the fourth up to 18 (or yo ...
... A periodic table can give you the proton / atomic number of an element, this also tells you how many electrons are in the atom. You will have used the rule of electrons shell filling, where: The first shell holds up to 2 electrons, the second up to 8, the third up to 8 and the fourth up to 18 (or yo ...
atom
... their nuclei are unstable and break down at a constant rate over time. Although the radiation these isotopes give off can be dangerous, they have important scientific and practical uses. ...
... their nuclei are unstable and break down at a constant rate over time. Although the radiation these isotopes give off can be dangerous, they have important scientific and practical uses. ...
Atomic theory intro
... 2.1.3 Define the terms mass number (A), atomic number (Z) and isotopes of an element 2.1.4 Deduce the symbol for an isotope given its mass number and atomic number 2.1.5 Calculate the number of protons, neutrons and electrons in atoms and ions from the mass number, atomic number and charge. 2.1.6 Co ...
... 2.1.3 Define the terms mass number (A), atomic number (Z) and isotopes of an element 2.1.4 Deduce the symbol for an isotope given its mass number and atomic number 2.1.5 Calculate the number of protons, neutrons and electrons in atoms and ions from the mass number, atomic number and charge. 2.1.6 Co ...
Document
... • How is an elements atomic number like a person’s fingerprint? • Homework: Calculate the p, n and electrons in the following: tantalum, samarium, uranium ...
... • How is an elements atomic number like a person’s fingerprint? • Homework: Calculate the p, n and electrons in the following: tantalum, samarium, uranium ...
Atoms, Elements, and the Periodic Table Part 1: The Atomic Model
... Atoms of one element must have the same # of protons, but can have a different # of neutrons. ...
... Atoms of one element must have the same # of protons, but can have a different # of neutrons. ...
Atoms, Elements, and the Periodic Table Part 1: The Atomic Model
... Atoms of one element must have the same # of protons, but can have a different # of neutrons. ...
... Atoms of one element must have the same # of protons, but can have a different # of neutrons. ...
Gr 10 Review sheet chemistry
... 1. Change of________________ 2. Formation of a ________________ 3. Formation of _____________ 4. Release or absorption of_____________ ...
... 1. Change of________________ 2. Formation of a ________________ 3. Formation of _____________ 4. Release or absorption of_____________ ...
Biochemistry…
... Water is a polar molecule, which means that it has a region with a slight negative charge (the oxygen atom) and a region with a slight positive charge (the hydrogen atoms) The oppositely charged regions of water molecules interact to form hydrogen bonds ...
... Water is a polar molecule, which means that it has a region with a slight negative charge (the oxygen atom) and a region with a slight positive charge (the hydrogen atoms) The oppositely charged regions of water molecules interact to form hydrogen bonds ...
history of the atom ppt student copy
... 1897 - JJ Thomson º used CRT to discover the electron. -modified CRT with poles (magnetic field) to attract cathode rays. - passed electricity through a gas at first; then used several samples of other elements. -behavior was same for all elements - rays were attracted to the anode (+). (___________ ...
... 1897 - JJ Thomson º used CRT to discover the electron. -modified CRT with poles (magnetic field) to attract cathode rays. - passed electricity through a gas at first; then used several samples of other elements. -behavior was same for all elements - rays were attracted to the anode (+). (___________ ...
Regents Chemistry 2011-2012
... 2. What determines whether or not an atom is stable? 3. What is the process whereby an atom gains stability called? 4. Describe what happens in this process named in question 3. 5. When balancing a nuclear equation, what two quantities are conserved? 6. What does the term ‘conserved’ mean in terms o ...
... 2. What determines whether or not an atom is stable? 3. What is the process whereby an atom gains stability called? 4. Describe what happens in this process named in question 3. 5. When balancing a nuclear equation, what two quantities are conserved? 6. What does the term ‘conserved’ mean in terms o ...
Chp 7.1 Atomic Theory and Radioactive Decay
... Isotopes and Mass Number • Isotopes are different atoms of the same element, with the difference between the two atoms being the number of neutrons in the nucleus. • Isotopes have the same number of protons and therefore the same atomic number as each other. • By having different numbers of neutron ...
... Isotopes and Mass Number • Isotopes are different atoms of the same element, with the difference between the two atoms being the number of neutrons in the nucleus. • Isotopes have the same number of protons and therefore the same atomic number as each other. • By having different numbers of neutron ...
Chapter 2 Worksheet: Atoms, Molecules, and Ions
... Briefly define the following: a. Law of Conservation of Mass Matter is neither created nor destroyed in a chemical reaction – molecules change to create new substances. b. Law of Definite Proportions All samples of a given substance will have the same ratio of atoms by mass (e.g., carbon dioxide is ...
... Briefly define the following: a. Law of Conservation of Mass Matter is neither created nor destroyed in a chemical reaction – molecules change to create new substances. b. Law of Definite Proportions All samples of a given substance will have the same ratio of atoms by mass (e.g., carbon dioxide is ...
Glencoe Chapter 4 Structure of the Atom for the Wiki
... Law of definite proportions • Joseph Proust specific substances always contain elements in the same ratio by mass. Law of Multiple Proportions Based on atomic theory but no experiment evidence at the time • The ratio of the masses of one element that combine with a constant mass of another element ...
... Law of definite proportions • Joseph Proust specific substances always contain elements in the same ratio by mass. Law of Multiple Proportions Based on atomic theory but no experiment evidence at the time • The ratio of the masses of one element that combine with a constant mass of another element ...
Midterm Review Questions and Answers
... 11. Lavoisier performed a similar experiment to the one described below. A strip of magnesium metal is wrapped around a nichrome wire and placed into a flask. The flask is then closed with the ends of the wire coming out of the flask. Next, a battery is connected to the nichrome wire. This connectio ...
... 11. Lavoisier performed a similar experiment to the one described below. A strip of magnesium metal is wrapped around a nichrome wire and placed into a flask. The flask is then closed with the ends of the wire coming out of the flask. Next, a battery is connected to the nichrome wire. This connectio ...
File
... 1. Elements are made of tiny particles called atoms. 2. All atoms of a given element are identical. 3. The atoms of a given element are different from those of any other element. 4. Atoms of one element can combine with atoms of other elements to form compounds. A given compound always has the same ...
... 1. Elements are made of tiny particles called atoms. 2. All atoms of a given element are identical. 3. The atoms of a given element are different from those of any other element. 4. Atoms of one element can combine with atoms of other elements to form compounds. A given compound always has the same ...
Review Sheet: Unit 6 Name__________________ CHEMISTRY: A
... reactants are two or more ____________ and/or compounds and a more ____________ product is formed. A ____________ reaction is just the opposite; a single compound is broken down into two or more simpler substances. In a ____________ ____________ reaction, the reactants and products take the general ...
... reactants are two or more ____________ and/or compounds and a more ____________ product is formed. A ____________ reaction is just the opposite; a single compound is broken down into two or more simpler substances. In a ____________ ____________ reaction, the reactants and products take the general ...
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.