All the members of a family of elements have the same number of valence electrons and similar chemical properties. metals, non-metals All of the elements touching the staircase (except Al) have some but not all of the properties of metals, and are called _. Elements in the same group are similar to each other. Summary The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All elements to the left of that staircase are _, and all elements to the right of that staircase are _. lanthanide, actinide In Group 13 between boron and aluminum, there is a "staircase". These are called the _ and the _ respectively. e.g, period 1, has the element Hydrogen to Helium from left to right of the periodic table, Whereas period 7, has the elements Francium, Radium. periodic law Each horizontal row of elements in the table is called a _ period Each vertical column in the table is called a _, or because of the resemblance between elements in the same column, a _ group, family In rows 4 through 7, there is a wide central section containing elements, each of which is called a _ transition element Rows 6 and 7 also contain two other sets of elements that are listed below the main chart. The horizontal column is called a 'period'. atomic mass The arrangement used today differs from that of Mendeleev in that Henry Mosely arranged the elements in order of increasing _ atomic number Mosely called his new arrangement of the table _ of the elements. have this name_ halogens - "salt-producing" The first period on the table in which we see transition metals is period _ 3 The most metallic elements on the periodic table are found in the _ upper left The least metallic elements on the periodic table are found in the _ lower right Which of the following is NOT a Group I metal? hydrogen Dimitri Mendeleev developed a chart-like arrangement of the elements called the _ periodic table Dimitri arranged the elements in order of increasing _, but what he discovered were may gaps. Those categories are _ and _ metal, non-metals The dividing line between these two categories of elements is in the shape of a _ staircase The elements that border or touch this dividing line are referred to as _ metalloids Explain why the elements in Group VIIA, Cl Fl. What are the vertical columns called groups. Atoms of each element within a group have the same number of electrons in their outermost electron shell. Elements belonging to one of the 18 groups will share similar properties. The periodic table was originally arranged according to_ atomic mass Our current periodic table is arranged according to _ increasing atomic number The periodic table is essentially divided into two types or categories of elements. 3 to YEndpoints Create a table array by calling the readtable function. What are the columns on the periodic table organized by Each vertical column on the periodic table is called a group.
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