History of the Periodic Table 1._______________ arranged the elements of the periodic table in order of increasing atomic number. 2._______________ arranged the elements of the periodic table in order of increasing atomic mass. 3.The periodic law says the chemical and physical properties of elements are repeated every _________ elements when in order of increasing ______________. 4.The work of ____________ in revising the periodic table resulted in the periodic law.

Basic Organization of the Periodic Table 1.What are rows on the periodic table called? How do they relate to atomic structure? 2.What two terms are used to refer to columns on the periodic table? How do columns relate to atomic structure? 3.How are the representative groups numbered across the periodic table? How do the group numbers relate to atomic structure?

Important Families 1.What two things do all of the elements in a family have in common? 2.The alkaline earth family tends to ______ electrons to become stable. 3.The Group 6A family tends to form ions with _____ charge. 4.Which family is so reactive that many of its elements react violently with water? 5.Which nonmetal family is the most reactive on the table?

Metals vs. Nonmetals 1.Predict the conductivity of strontium. 2.What state of matter do you expect find the halogens at room temperature? 3.In general, how do nonmetals become stable? (Gaining or losing electrons) 4.All of the diatomic elements are (metals or nonmetals). 5.How do metals generally become stable? (gaining or losing electrons)

Defining the Trends 1.Define ionization energy. 2.Define electronegativity. 3.Define atomic radius. 4.Define ionic radius.

Remembering the Patterns 1.How does atomic radius change across a period? Down a group? 2.How does ionization energy change across a period? Down a group? 3.How does electronegativity change across a period? Down a group?

Moseley arranged the elements of the periodic table in order of increasing atomic number. Mendeleev arranged the elements of the periodic table in order of increasing atomic mass. The periodic law says the chemical and physical properties of elements are repeated every eight elements when in order of increasing atomic number. The work of Moseley in revising the periodic table resulted in the periodic law.

What are rows on the periodic table called? periods How do they relate to atomic structure? They give the outer energy level for the elements in which electrons are found. What two terms are used to refer to columns on the periodic table? Groups or Families

How do columns relate to atomic structure? Family or group tells you how many valence electrons an element has. How are the representative groups numbered across the periodic table? Representative or main group elements are sometimes numbered with Roman numerals. How do the group numbers relate to atomic structure? The group number tells you about the valence electrons.

What two things do all of the elements in a family have in common? # valence electrons and reactivity The alkaline earth family tends to lose electrons to become stable and form cations. The Group 6A family tends to form anions with -2 charge. Which family is so reactive that many of its elements react violently with water? Alkali metals (Group IA) Which nonmetal family is the most reactive on the table? halogens

Predict the conductivity of strontium. Sr is a metal and would conduct well. What state of matter do you expect find the halogens at room temperature? Halogens are gases at room temperature. In general, how do nonmetals become stable? (Gaining or losing electrons) All of the diatomic elements are (metals or nonmetals). How do metals generally become stable? (gaining or losing electrons)

AR  across the period AR  as you move down group IE  across the period IE  down the family EN  across the period EN  down the group