click below
click below
Normal Size Small Size show me how
chemistry chapter 5
study guide
Question | Answer |
---|---|
Periodic Table of the Elements | (p.105) A table of the chemical elements arranged to display their periodic properties in relation to their atomic numbers. |
Periodic Law | (p.107) The law stating that the properties of elements vary with their atomic numbers in a periodic way. |
Transuranium Elements | (p.107) An element with an atomic number higher than ninety-two(92) |
Group | (p.111) A vertical column of elements in the periodic table with similar physical and chemical properties. (Same as family.) |
Family | (p.111) A vertical column of elements in the periodic table with similar physical and chemical properties. (Same as group.) |
Period | (p.111) A horizontal row of elements in the periodic table; also called a series. |
Series | (p.111) A horizontal row of elements in the periodic table; also called a period. |
International Union of Pure and Applied Chemistry (IUPAC) | (p.111) The body responsible for the standardization of chemical nomenclature and usage. |
North American Convention Periodic Table | (p.111) A combination of Arabic numerals and letters are placed above each column to indicate the valence electron structure of the elements in each column. |
Representative Group | (p,111) Elements in the s and p blocks of the periodic table; designated with A suffixes in the North American Convention Periodic Table. |
Metal | (p.111) An element located to the left of the heavy stair-step line in the periodic table; an element that is typically solid, malleable, ductile, lustrous, that conducts electricity and heat well, and that forms positive ions when it gives away its few v |
Nonmetal | (p.112) An element located to the right of, but not touching, the heavy stair-step line in the periodic table; generally a gas or soft. |
Metalloid | (p.112) An element whose properties lie between those of metals and nonmetals;a compound found touching the heavy stair-step line in the periodic table. |
Lanthanide Series | (p.112) A portion of the sixth series of the periodic table that includes the inner transition metals from lanthanum to lutetium. |
Actinide Series | (p.112) A portion of the seventh series of the periodic table that includes the inner transition metals from actinium to lawrencium. |
Atomic Radius | (p.113) The distance from the center of an atoms nucleus to its outermost electron; measured using a x-ray diffraction. |
First Ionization energy | (p.115) The minimum amount of energy required to remove the first electron from the outermost shell of a single neutral atom in its gaseous state. |
Electron Affinity | (p.115) The amount of energy required or released when an electron is added to a neutral atom to form a negative ion. |
Electronegativity | (p.116) A measure of the tendency of bonded atoms to attract electrons: designated by a small decimal called the electronegativity number (EN). |
Descriptive Chemistry | (p.118) The study of elements and the compounds they form that stresses identification of properties rather than theoretical calculations. |
Hydrocarbons | (p.447) An organic, non polar compound containing only hydrogen and carbon atoms. |
Alkali Metals | (p.120) A group 1 (1A) metal; has one valence electron. |
Alkaline Earth-Metals | (p.120) A Group 2 (2A) metal; has two valence electrons. |
Big Bang | (p.121) The most popular evolutionary theory for the origin of the universe; suggests that all matter in the universe was condensed to a tiny point and expanded rapidly in a giant explosion that started our universe some 13.7 billion years ago. |
Transition Metals | (p.123) An element in the d block groups (3-12) of the periodic table. |
Inner Transition Metals | (p.124) A member of the lanthanide of actinide series. |
Paramagnetism | (p.124) A weak attraction of a substance by a magnetic field, usually as a result of unpaired electrons. |
Post-Transition Metals | (p.125) A metal found in families 3-5 in the periodic table. |
Metalloids | (p.112) An element whose properties lie between those of metals and nonmetals: a compound found touching the heavy stair-step line in the periodic table. |
Semiconductors | (p.125) A substance with an electrical conductivity intermediate between a conductor and an insulator; can act as either a conductor or an insulator depending on the circumstances. |
Oxide | (p.130) A binary compound in which the oxidation number of oxygen is -2. (for example, Li2O.) |
Sulfide | (p.130) A binary compound in which the oxidation number of sulfur is -2. (for example, h2s.) |
Halogen | (p.131) A group 17 (7A) element; has seven valence electrons, making it chemically reactive. |
Noble Gas | (p.132) A group 18 (8A) element; has a full outer energy level, very stable and thus essentially inert. |
Johann Dobereiner | A chemist that began to arrange known elements systematically. |
John Newlands | Worked to organize the elements and suggested the law of octaves. Organized elements by atomic mass. |
Dmitri Mendeleev | Arranged elements by their atomic masses, also organized elements that were not yet discovered. He as well formed the Periodic Law. |
Henry Mosley | Found that the frequencies of X-Rays scatted by the elements are related to the number of protons in the nucleas. This revealed the electron structure of the atom that was related to the atomic number. |
Linus Pauling | He was the first chemist to quantify electronegativity, noted flourine held the strongest electrons, and cesium held the weakest. |
Henry Cavendish | First to systematically collect and study Hydrogen. Also, he studied other gases and electricity. |
Sir Humphrey Davy | First to isolate pure forms of Magnesium, Calcium, Strontium, and Barium. |
Daniel Rutherford | Recognized Nitrogen as an element, and later described the properties of Oxygen. |
Hydrogen | It is lightest and most abundant element in the universe, is extremely flammable in air, and is used in the industrial production of ammonia. |
Nitrogen | Existing as diatomic molecules, this gas is tasteless, colorless, and odorless, and it accounts for approximately 78% of the earth's atmosphere. |
Oxygen | This element constitutes 21% of the earth's atmosphere and is the most abundant element in the earth's crust. It is essential for life in all animals and humans. |
Sulfur | A nonmetallic element referred to as brimstone in the Bible and exists in a variety of forms, including a brittle, yellow, crystalline solid in its native form. |
Transition metals | The large group of elements that have their highest energy electrons in interior d sub levels. |
Post-transition metals | What all of the metals in the p block of the periodic table are called. |
Electronegativity | Not typically found in a cell on the periodic table. |
H & He | According to the big band theory, the very first elements would have probably been these. |
Elements with three-letter symbols | Are all radioactive & have not been verified. |
High electronegativities are associated with large ionization energies and high electron affinities. | True |
Graphite and diamond are both composed of the same element, carbon. | True |
The presence of calcium or magnesium ions in water make it "hard". | True |
The largest ionization energies are for the removal of an electron from a full energy level. | True |
Hydrogen normally exists as a monatomic gas. | False |
None of the noble gases form compounds with other elements. | False |
Halogens are easily obtainable in their elemental forms. | False |
The most reactive as well as most electronegative element. | Flourine |
The only metal that is a liquid at room temperature | Mercury |
The name given to the horizontal rows in the periodic table | Period or Series |
The name given to the B-group of elements | Transition Metals |