CHEM 1301 FALL 2003 TEST 1 VERSION 1 NO CHEATING
... All samples of chlorine contain the two isotopes, 35Cl and 37Cl, in the same ratio. The mass of oxygen that is combined with a fixed mass of nitrogen in compounds containing only nitrogen and oxygen can be expressed as a ratio of nice numbers. The atomic masses of all of the elements in the periodic ...
... All samples of chlorine contain the two isotopes, 35Cl and 37Cl, in the same ratio. The mass of oxygen that is combined with a fixed mass of nitrogen in compounds containing only nitrogen and oxygen can be expressed as a ratio of nice numbers. The atomic masses of all of the elements in the periodic ...
Terms to Know
... Positrons : The positron is the antiparticle of the electron. It has the same mass and the same quantity of electric charge as does the electron, but its electric charge is positive rather than negative. Radioactivity : Radioactivity is the emission of radiation by unstable nuclei. That radiation ma ...
... Positrons : The positron is the antiparticle of the electron. It has the same mass and the same quantity of electric charge as does the electron, but its electric charge is positive rather than negative. Radioactivity : Radioactivity is the emission of radiation by unstable nuclei. That radiation ma ...
File
... the mass of the element. Isotopes are identified by their mass, which is the total number of protons and neutrons. There are two ways that isotopes are generally written. They both use the mass of the atom where mass = (number of protons + number of neutrons). The first way is to put the mass as a s ...
... the mass of the element. Isotopes are identified by their mass, which is the total number of protons and neutrons. There are two ways that isotopes are generally written. They both use the mass of the atom where mass = (number of protons + number of neutrons). The first way is to put the mass as a s ...
Unit 3 Note Outline
... History of the Atom Democritis - Ancient Greek Philosopher used the word Two discoveries led to the rebirth of the idea of the atom 1. Lavoisier 2. Proust (1799) This led to: ...
... History of the Atom Democritis - Ancient Greek Philosopher used the word Two discoveries led to the rebirth of the idea of the atom 1. Lavoisier 2. Proust (1799) This led to: ...
General CHemistry Unit 2 Homework Notes
... Subscripts in a chemical formula represent the relative number of each type of atom. The subscript always follows the symbol for the element. Example: In a water molecule, H2O, there are 2 hydrogen atoms and one oxygen atom. Parentheses are used when a subscript affects a group of atoms. Example: th ...
... Subscripts in a chemical formula represent the relative number of each type of atom. The subscript always follows the symbol for the element. Example: In a water molecule, H2O, there are 2 hydrogen atoms and one oxygen atom. Parentheses are used when a subscript affects a group of atoms. Example: th ...
Atomic Theory and Structure
... • Isotopes are atoms that have the same number of protons, but different numbers of neutrons • Mass Number is the sum of protons and neutrons in an atom • Atomic Mass is the average mass of an element’s isotopes ...
... • Isotopes are atoms that have the same number of protons, but different numbers of neutrons • Mass Number is the sum of protons and neutrons in an atom • Atomic Mass is the average mass of an element’s isotopes ...
Atomic Structure
... Different atoms have different ____________ and ____________ The differing properties of matter are due to the size, shape, and movement of ____________ Changes in matter result from changes in the ____________ of atoms and not the atoms themselves ...
... Different atoms have different ____________ and ____________ The differing properties of matter are due to the size, shape, and movement of ____________ Changes in matter result from changes in the ____________ of atoms and not the atoms themselves ...
Chapter 3 Atoms and Elements
... Since atomic mass is equal to the sum of the number of protons and neutrons, how can you have a fractional number? How was an atomic mass value of 35.45 arrived at? Since in a “handful” of Cl there is a mixture of two isotopes in the abundances shown on the left, an average atomic mass has been defi ...
... Since atomic mass is equal to the sum of the number of protons and neutrons, how can you have a fractional number? How was an atomic mass value of 35.45 arrived at? Since in a “handful” of Cl there is a mixture of two isotopes in the abundances shown on the left, an average atomic mass has been defi ...
® Atoms ® Make up all matter ® Made up of smaller particles called
... of the volume of an atom is made up of the electron cloud Enormous compared to the nucleus VERY SMALL (mass) 2,000 electrons = 1 proton ...
... of the volume of an atom is made up of the electron cloud Enormous compared to the nucleus VERY SMALL (mass) 2,000 electrons = 1 proton ...
Atomic Structure AKS Correlation Use the modern atomic theory to
... formed by 2 or more atoms Describe the basic structure of the atom as protons, neutrons and electrons in specific arrangements. Identify the relative location, size and charge of subatomic particles. Define atom. What charge does an atom have? Fill in chart below proton neutron electron Location Nuc ...
... formed by 2 or more atoms Describe the basic structure of the atom as protons, neutrons and electrons in specific arrangements. Identify the relative location, size and charge of subatomic particles. Define atom. What charge does an atom have? Fill in chart below proton neutron electron Location Nuc ...
Isotopes and Radioactive Decay
... GAMMA RADIATION: Radiation that is made up of ________________________ rays. A gamma ray is high-energy and contains no _____________ and is represented by the symbol __________. Gamma rays usually accompany ___________________ and ___________________ radiation. Gamma rays also account for _________ ...
... GAMMA RADIATION: Radiation that is made up of ________________________ rays. A gamma ray is high-energy and contains no _____________ and is represented by the symbol __________. Gamma rays usually accompany ___________________ and ___________________ radiation. Gamma rays also account for _________ ...
Atom - Sites
... atoms join together chemically. •Combinations of two or more different elements are called compounds. •All compounds are molecules but not all molecules are compounds. (ex. H2O vs. O2) •Molecules can also join together to form larger molecules. •Many, many repeating small molecules joined together f ...
... atoms join together chemically. •Combinations of two or more different elements are called compounds. •All compounds are molecules but not all molecules are compounds. (ex. H2O vs. O2) •Molecules can also join together to form larger molecules. •Many, many repeating small molecules joined together f ...
Name: Date: Period: Page # Evolution of Atomic Theory (Changed
... (Changed over time as new discoveries were made) ...
... (Changed over time as new discoveries were made) ...
Test Review: Unit 1 - Ms. Hill`s Pre
... a. Fusion: The combination of smaller molecule into larger ones. This happens on the sun. b. Fission: The splitting of large molecules into smaller radioactive daughter isotopes (“Mean Girls”) we do this in nuclear reactor and bombs! c. The big picture….both nuclear reaction result in the release of ...
... a. Fusion: The combination of smaller molecule into larger ones. This happens on the sun. b. Fission: The splitting of large molecules into smaller radioactive daughter isotopes (“Mean Girls”) we do this in nuclear reactor and bombs! c. The big picture….both nuclear reaction result in the release of ...
Unit Map Chemistry I Unit III
... Students will understand that the atom’s nucleus is composed of protons and neutrons that are much more massive than electrons. When an element has atoms that differ in the number of neutrons, these atoms are called different isotopes of the element. SC-HS-4.6.1 Students will: explain the relation ...
... Students will understand that the atom’s nucleus is composed of protons and neutrons that are much more massive than electrons. When an element has atoms that differ in the number of neutrons, these atoms are called different isotopes of the element. SC-HS-4.6.1 Students will: explain the relation ...
Isotope
Isotopes are variants of a particular chemical element which differ in neutron number, although all isotopes of a given element have the same number of protons in each atom. The term isotope is formed from the Greek roots isos (ἴσος ""equal"") and topos (τόπος ""place""), meaning ""the same place""; thus, the meaning behind the name it is that different isotopes of a single element occupy the same position on the periodic table. The number of protons within the atom's nucleus is called atomic number and is equal to the number of electrons in the neutral (non-ionized) atom. Each atomic number identifies a specific element, but not the isotope; an atom of a given element may have a wide range in its number of neutrons. The number of nucleons (both protons and neutrons) in the nucleus is the atom's mass number, and each isotope of a given element has a different mass number.For example, carbon-12, carbon-13 and carbon-14 are three isotopes of the element carbon with mass numbers 12, 13 and 14 respectively. The atomic number of carbon is 6, which means that every carbon atom has 6 protons, so that the neutron numbers of these isotopes are 6, 7 and 8 respectively.