Ch5 Chem
Terms
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- period
- row in the periodic table
- ion
- atom or group of bonded atoms that has positive or negative charge
- halogens
- group 17 elements (flourine, chlorine, bromine, iodine, astatine)
- ionization
- the process that results in the formation of an ion
- main-group elements
- p block & s block elements together
- anion
- negative ion
- electron affinity
- energy change that occurs when an electron is acquired by a neutral atom
- atomic radius
- one-half the distance between the nuclei of identical atoms that are bonded together
- group
- column in the periodic table
- alkali metals
- group 1 elements (lithium, sodium, potassium, rubidium, cesium, francium)
- alkaline-earth metals
- group 2 elements (beryllium, magnesium, calcium, stromium, barium, radium)
- lanthanides
- 14 elements with numbers 58-71 (Ce-Lu)
- periodic table
- the arrangement of the elements in order of their atomic numbers so that elements with similar properties fall in the same column (group)
- cation
- positive ion
- actinides
- 14 elements with numbers 90-103(Th-Lr)
- IE (ionization energy)
- energy required to remove one electron from a neutral atom of an element
- electronegativity
- measure of ability of an atom in a chemical compound to attract electrons
- transition elements
- d block elements with typical metallic properties
- valence electrons
- electrons available to be lost, gained, or shared in formation of chemical compounds
- periodic law
- the physical and chemical properties of elements are functions of their atomic numbers