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18 Cards in this Set
- Front
- Back
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Periodic law
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The physical and chemical properties of the elements are periodic functions of their atomic numbers.
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periodic table
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An arrangement of the elements in order of their atomic number so that elements with similar properties fall in the same column, or group.
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lanthanides
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the 14 elements with atomic numbers from 58 (cerium, Ce) to 71 (Lutetium, Lu).
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Actinides
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the 14 elements with atomic numbers from 90 (thorium, Th) to 103 (lawrecium, Lr).
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alkali metals
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The elements in group 1 (lithium, sodium, potassium, rubidium, cesium, and francium).
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alkali-earth metals
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elements in group 2. (berylium, magnesium, calcium, strontium, barium, and radium.)
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transition elements
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the d-block elements with typical metallic properties.
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main-group elements
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the p-block elements plus the s-block elements.
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halogens
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Elements of group 17 (fluorine, chlorine, bromine, iodine, and astatine.
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atomic radius
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one-half the distance between the nuclei of identical atoms that are bonded together.
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ion
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an atom or group of bonded atoms that has a positive or negative charge.
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ionization
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any process that results in the formation of an ion.
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ionization energy
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the energy required to remove one electron from a neutral atom of an element.
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electron affinity
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the energy change that occurs when an electron is acquired by a neutral atom.
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cation
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positive ion.
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anion
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negative ion.
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valence electrons
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the electrons available to be lost, gained, or shared in the formation of chemical compounds.
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electronegativity
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a measure of the ability of an atom in a chemical compound to attract electrons.
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