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unit four chemistry

vocabulary for unit four chemistry

TermDefinition
actinide series in the periodic table, f-block elements from period 7 that follow element actinium
alkali metal group 1 elements, except for hydrogen, they are reactive and usually exist as compound with other elements
alkaline earth metals group 2 elements in modern periodic table and are highly reactive
atomic radius 1/2 the distance between adjacent nuclei
electronegativity indicates relative ability of an elements atoms to attract electrons in a chemical bond
formula unit simplest ratio of ions represented in an ionic compound
group vertical column of elements in the periodic table arranged in order of increasing atomic number, also called a family
halogen highly reactive group 17 elements
inner transition metal type of group B element that is contained in the f-block of periodic table and characterized by a filled outermost orbital and filled or partially filled 4f & 5f orbitals
ion atom or bonded group of atoms with a positive or negative charge
ionization energy energy required to remove an electron from a gaseous atom, generally increases in moving left to right across a period and decreases moving down a group
lanthanide series in the periodic table, the f-block elements from period 6 that follow the element lanthanum
metal element solid at room temperature; good conductor of heat and electricity and generally is shiny. most are ductile and malleable.
metalloid elements that has physical and chemical properties of both metals and nonmetals
molar mass mass in grams of one mole of any pure substance
mole ratio in a balanced equation the ratio between the numbers of moles of any 2 substances
noble gas extremely unreactive group 18 elements
nonmetal elements that are generally gases or dull, brittle solids that are poor conductors of heat and electricity
octet rule states that atoms gain, lose , or share electrons to acquire stable electron configuration of a noble gas
period horizontal row of elements in the modern periodic table
periodic law states that when elements are arranged by increasing atomic number, there is a periodic repetition of their properties
representative element elements from groups 1, 2, 13-18 in the modern periodic table, possessing a wider range of chemical and physical properties.
transition elements elements in group 3-12 of modern periodic table and further divided into transition metals and inner transition metals
transition metal elements in group 3-12 contained in d-block of periodic table and with some exceptions characterized by filled outermost s orbital of energy level n and filled or partially filled d orbital of n-1
valence electron electrons in an atoms outermost orbitals determine chemical properties of an element.
Created by: mrsklann