Unit 2 Vocabulary Flashcard



  • There is a periodic repitition of chemical and physical properties of the elements when they are arranged by increasing number






  • The boxes on the periodic table are arranged in order of increasing atomic number into a series of columns called groups or families or rows







  • Families and rows




Representive Elements


  • Elements of groups 1,2 and 13-18 in the modern periodic table, possessing a wide range of chemical and physical properties 




Transition Elements


  • Elements in groups 3-12 of the modern periodic table and are further divided into transition metals and inner transition metals






  • Elements that are generally shiny when smooth and clean, solid at room temperature, and good conductors of heat and electricity




Alkali Metals


  • Group 1 elements, except for hydrogen, that are reactive and usually exist as compounds with other elements




Alkaline Earth Metals


  • Group 2 elements in the modern periodic table and are highly reactive




Transition Elements


  • An element in groups 3-12 that is contained in the d-block of the periodic table




Inner Transition Metals


  • A type of group B elements that is contained in the f-block of the periodic table and is characterized by a filled outermost orbital




Lathanide Series


  • In the periodic table, the f-block elements from period 6 that follow the element lanthanum




Actinide Series


  • In the periodic table, the f-block elements from period 7 that follow the element actinium






  • Elements that are generally gases, or brittle, dull-looking solids







  • A highly reactive group 17 element




Noble Gases


  • An extremely unreactive group 18 element






  • an element that has physical and chemical properties of both metals and nonmetals






  • An atom or bonded group of atoms that has a positive or negative charge




Ionization Energy


  • The energy required to move an electron from a gaseous atom




Octet Rule


  • Atoms tend to gain, lose or share electrons in order to acquire a full set of eight valence electrons






  • Indicates the relative ability (of an element) of its atoms to attract electrons in a chemical bond

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