Oct 14th ,2015
... (except the ion assessment) • You make make any handwritten notes on it you want. ( I will give some hints on that through out the year) • Find a safe and easily accessible place for it. – If you don’t have a pocket you can make one out of the provided cardstock later today in your ...
... (except the ion assessment) • You make make any handwritten notes on it you want. ( I will give some hints on that through out the year) • Find a safe and easily accessible place for it. – If you don’t have a pocket you can make one out of the provided cardstock later today in your ...
03 Atoms – Nuclides
... a positively charged alpha particle (α), which is the same as a helium nuclei consisting of two neutrons and two protons a negatively charged beta minus particle (β-), which is the same as an electron a positively charged beta plus particle (β+), which is the same as a positron, a particle of equal ...
... a positively charged alpha particle (α), which is the same as a helium nuclei consisting of two neutrons and two protons a negatively charged beta minus particle (β-), which is the same as an electron a positively charged beta plus particle (β+), which is the same as a positron, a particle of equal ...
chapter_3_study_guide
... Rutherford's Experiment Ernest Rutherford studied, among many other things, __________________ (α) particles. Alpha particles are made of two_____________________ and two ______________________. They can be emitted by radio active material and fly through the air. In Rutherford's experiment he bomba ...
... Rutherford's Experiment Ernest Rutherford studied, among many other things, __________________ (α) particles. Alpha particles are made of two_____________________ and two ______________________. They can be emitted by radio active material and fly through the air. In Rutherford's experiment he bomba ...
Average Atomic Mass
... size, mass, and other properties; atoms of different elements differ in size, mass, and other properties. 3. Atoms cannot be subdivided, created, or destroyed. 4. Atoms of different elements combine in simple whole-number ratios to form compounds. 5. In chemical reactions, atoms are combined, separa ...
... size, mass, and other properties; atoms of different elements differ in size, mass, and other properties. 3. Atoms cannot be subdivided, created, or destroyed. 4. Atoms of different elements combine in simple whole-number ratios to form compounds. 5. In chemical reactions, atoms are combined, separa ...
protons and neutrons
... Cathode rays have identical properties regardless of the element used to produce them. All elements must contain identically charged electrons. Atoms are neutral, so there must be positive particles in the atom to balance the negative charge of the electrons Electrons have so little mass that a ...
... Cathode rays have identical properties regardless of the element used to produce them. All elements must contain identically charged electrons. Atoms are neutral, so there must be positive particles in the atom to balance the negative charge of the electrons Electrons have so little mass that a ...
Physical Science Notes–Ch. 17-Glencoe
... From this information, he was able to ____________________________________________ of new elements that had not yet been discovered. ...
... From this information, he was able to ____________________________________________ of new elements that had not yet been discovered. ...
Section 2.1
... • All atoms of a given element are identical to one another in mass and other properties, but atoms of an element are unique to that element only. • Atoms of an element are not changed into atoms of a different element by chemical reactions; they are neither created nor destroyed. • Compounds are fo ...
... • All atoms of a given element are identical to one another in mass and other properties, but atoms of an element are unique to that element only. • Atoms of an element are not changed into atoms of a different element by chemical reactions; they are neither created nor destroyed. • Compounds are fo ...
Chapter 5 The Structure of the Atom
... 1. A Cu penny composed of pure copper 2. Grind the penny into fine powder, each speck of powder is made smaller 3. The smallest piece left is an atom 4. The Cu penny contains 2.4 x1022 atoms 5. However, if you lined up 100,000,000 copper atom side by side it would only be 1 cm long 6. Atoms are very ...
... 1. A Cu penny composed of pure copper 2. Grind the penny into fine powder, each speck of powder is made smaller 3. The smallest piece left is an atom 4. The Cu penny contains 2.4 x1022 atoms 5. However, if you lined up 100,000,000 copper atom side by side it would only be 1 cm long 6. Atoms are very ...
Chapter 4 Atomic Structure
... identical. Atoms of any one element are different from those of any other element. ...
... identical. Atoms of any one element are different from those of any other element. ...
Basic Atomic Structure and Isotope Symbols
... The Atomic Number is found in the element's box on the Periodic Table. The Mass Number depends on which isotope it is and is NOT found on the Periodic Table. Atomic Mass - is the weight of a particle as compared to Carbon - 12. Atomic Weight - is the average weight of all the atoms of all the isotop ...
... The Atomic Number is found in the element's box on the Periodic Table. The Mass Number depends on which isotope it is and is NOT found on the Periodic Table. Atomic Mass - is the weight of a particle as compared to Carbon - 12. Atomic Weight - is the average weight of all the atoms of all the isotop ...
Ch 30 Nuclear Physics
... particles: electrons (-), protons (+), and neutrons (0) The nucleus of the atom contains the protons and the neutrons (also called nucleons.) The electrons surround (orbit) the nucleus. Electrons and protons have equal but ...
... particles: electrons (-), protons (+), and neutrons (0) The nucleus of the atom contains the protons and the neutrons (also called nucleons.) The electrons surround (orbit) the nucleus. Electrons and protons have equal but ...
Practice Test/Quiz Questions – Chapter 1, 2, 3 Chemical Foundations
... All of the following details are true of Rutherford’s famous gold foil experiment, EXCEPT: a. A very, very few alpha particles were turned through an angle of 90° or more b. Almost all alpha particles went through gold foil as if it were not present c. Experiment results confirmed Dalton’s atom mode ...
... All of the following details are true of Rutherford’s famous gold foil experiment, EXCEPT: a. A very, very few alpha particles were turned through an angle of 90° or more b. Almost all alpha particles went through gold foil as if it were not present c. Experiment results confirmed Dalton’s atom mode ...
Atoms
... The element antimony (Sb) has naturally occurring isotopes with mass numbers of 121 and 123. The relative abundance and atomic masses are 57.12 % for mass = 120.90 amu, and 47.29% for mass = 122.90 amu. Calculate the atomic mass of antimony. ...
... The element antimony (Sb) has naturally occurring isotopes with mass numbers of 121 and 123. The relative abundance and atomic masses are 57.12 % for mass = 120.90 amu, and 47.29% for mass = 122.90 amu. Calculate the atomic mass of antimony. ...
Nuclear Chemistry - Solon City Schools
... 2. List the subatomic parts of the atom including quarks 3. Explain the difference in isotopes of an atom 4. Explain alpha, beta, and gamma radiation and what happens to the nucleus 5. Calculate half-lives of radioactive materials 6. List differences between a fusion and fission reactions ...
... 2. List the subatomic parts of the atom including quarks 3. Explain the difference in isotopes of an atom 4. Explain alpha, beta, and gamma radiation and what happens to the nucleus 5. Calculate half-lives of radioactive materials 6. List differences between a fusion and fission reactions ...
Chapter 5 - Effingham County Schools
... nucleus, called the ________ ________. For example, a hydrogen atom has 1 proton so its atomic number is 1. The total number of _______ and _________ in an atom’s nucleus is called its atomic mass number. _______ are atoms of the same element that have a different number of neutrons. Ions are formed ...
... nucleus, called the ________ ________. For example, a hydrogen atom has 1 proton so its atomic number is 1. The total number of _______ and _________ in an atom’s nucleus is called its atomic mass number. _______ are atoms of the same element that have a different number of neutrons. Ions are formed ...
1 Notes Ch. 4 and 25: Atomic Structure and Nuclear Chemistry
... • All nuclear reactions are transmutation reactions except for __________________ emission, which does not alter an atom’s atomic number. II. Induced Transmutation • Before 1919, the only way to change the nucleus or cause transmutation was to wait for _______________________. • In 1919 Rutherford w ...
... • All nuclear reactions are transmutation reactions except for __________________ emission, which does not alter an atom’s atomic number. II. Induced Transmutation • Before 1919, the only way to change the nucleus or cause transmutation was to wait for _______________________. • In 1919 Rutherford w ...
Atoms: The Building Blocks of Matter
... 24. A sample of nickel (average atomic mass 58.69 u) has a mass of 11.74 g. How many atoms does it contain? ...
... 24. A sample of nickel (average atomic mass 58.69 u) has a mass of 11.74 g. How many atoms does it contain? ...
Name
... 14. What do isotopes of the same element have in common and what is different? Isotopes have the same atomic number, # of protons & # of electrons. Isotopes have different mass numbers and # of neutrons. 15. An element has 19 protons, 19 electrons and 20 neutrons. It has an atomic number of __19_ an ...
... 14. What do isotopes of the same element have in common and what is different? Isotopes have the same atomic number, # of protons & # of electrons. Isotopes have different mass numbers and # of neutrons. 15. An element has 19 protons, 19 electrons and 20 neutrons. It has an atomic number of __19_ an ...
Chemistry Worksheet: Atomic Structure and Isotopes
... Use the mass number in the name of the isotope as was done in 1 - 4. e. 52 neutrons in each nucleus and a mass number of 92. f. A mass number of 112 and 48 electrons in each uncharged atom. g. A mass number of 75 and 36 electrons in each -3 anion. h. A mass number of 262 and 159 neutrons in the nucl ...
... Use the mass number in the name of the isotope as was done in 1 - 4. e. 52 neutrons in each nucleus and a mass number of 92. f. A mass number of 112 and 48 electrons in each uncharged atom. g. A mass number of 75 and 36 electrons in each -3 anion. h. A mass number of 262 and 159 neutrons in the nucl ...
Isotopes File - Northwest ISD Moodle
... Where has the cancer spread? And how can it be treated? In the case of one type of cancer, the answer to both questions may involve the isotope iodine-131. Iodine-131 is an artificial isotope of iodine. This isotope releases radiation that can kill cancer cells, especially those that originated in t ...
... Where has the cancer spread? And how can it be treated? In the case of one type of cancer, the answer to both questions may involve the isotope iodine-131. Iodine-131 is an artificial isotope of iodine. This isotope releases radiation that can kill cancer cells, especially those that originated in t ...
Unit #3 - Wikispaces
... 9) Rutherford's Atomic Theorya) Ernest Rutherford (1871 - 1937 = 66 yrs. old). English physicist. b) Rutherford's experiment concluded that most of the atom must consist of space without the nucleus. The nucleus must occupy a very, very, small portion of the volume of an atom. This nucleus contains ...
... 9) Rutherford's Atomic Theorya) Ernest Rutherford (1871 - 1937 = 66 yrs. old). English physicist. b) Rutherford's experiment concluded that most of the atom must consist of space without the nucleus. The nucleus must occupy a very, very, small portion of the volume of an atom. This nucleus contains ...
Taking a Look Inside the Atom
... What is stuff made of? Greek philosopher Democritus began the search for a description of matter more than 2400 years ago, wondering if matter could be divided into smaller and smaller pieces forever. His theory: Eventually, there would be a smallest possible piece that couldn’t be divided. H ...
... What is stuff made of? Greek philosopher Democritus began the search for a description of matter more than 2400 years ago, wondering if matter could be divided into smaller and smaller pieces forever. His theory: Eventually, there would be a smallest possible piece that couldn’t be divided. H ...
Promethium
Promethium, originally prometheum, is a chemical element with symbol Pm and atomic number 61. All of its isotopes are radioactive; it is one of only two such elements that are followed in the periodic table by elements with stable forms, a distinction shared with technetium. Chemically, promethium is a lanthanide, which forms salts when combined with other elements. Promethium shows only one stable oxidation state of +3; however, a few +2 compounds may exist.In 1902, Bohuslav Brauner suggested there was an element with properties intermediate between those of the known elements neodymium (60) and samarium (62); this was confirmed in 1914 by Henry Moseley who, having measured the atomic numbers of all the elements then known, found there was an element with atomic number 61. In 1926, an Italian and an American group claimed to have isolated a sample of element 61; both ""discoveries"" were soon proven to be false. In 1938, during a nuclear experiment conducted at Ohio State University, a few radioactive nuclides were produced that certainly were not radioisotopes of neodymium or samarium, but there was a lack of chemical proof that element 61 was produced, and the discovery was not generally recognized. Promethium was first produced and characterized at Oak Ridge National Laboratory in 1945 by the separation and analysis of the fission products of uranium fuel irradiated in a graphite reactor. The discoverers proposed the name ""prometheum"" (the spelling was subsequently changed), derived from Prometheus, the Titan in Greek mythology who stole fire from Mount Olympus and brought it down to humans, to symbolize ""both the daring and the possible misuse of mankind's intellect"". However, a sample of the metal was made only in 1963.There are two possible sources for natural promethium: rare decays of natural europium-151 (producing promethium-147), and uranium (various isotopes). Practical applications exist only for chemical compounds of promethium-147, which are used in luminous paint, atomic batteries, and thickness measurement devices, even though promethium-145 is the most stable promethium isotope. Because natural promethium is exceedingly scarce, it is typically synthesized by bombarding uranium-235 (enriched uranium) with thermal neutrons to produce promethium-147.