[Answer] in the periodic table the rows are called _______ and the columns are called _________

Answer: 8A

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in the periodic table the rows are called _______ and the columns are called _________ The modern periodic table provides a useful framework for analyzing chemical reactions and is widely used in chemistry physics and other sciences. The seven rows of the table called periods generally have metals on the left and nonmetals on the right. The … History of the periodic table - Wikipedia Period 5 element - Wikipedia Period 5 element - Wikipedia History of the periodic table - Wikipedia The columns represent the groups. Groups 1 2 and 13 to 18 constitute the main group. Sometimes groups 3 and 12 as well as the lanthanides and actinides (the two rows at the bottom) are also included in the main group. In chemistry and atomic physics the main group is the group of elements (sometimes called the representative elements) whose lightest members are represented by helium lithium beryllium boron carbon nitrogen oxygen and fluorine as arranged in the periodic table … The periodic table is an arrangement of the chemical elements structured by their atomic number electron configuration and recurring chemical properties. In the basic form elements are presented in order of increasing atomic number in the reading sequence. Then rows and columns are created by starting new rows and inderting blank cells so that rows (periods) and columns (groups) show elements with recurring properties (called periodicity). For example all elements in group (column) 18 are noble gasesthat hardl… Sun Sep 15 2002 14:30:00 GMT-0400 (Eastern Daylight Time) · A block of the periodic table is a set of elements unified by the orbitals their valence electrons or vacancies lie in. The term appears to have been first used by Charles Janet. Each block is named after its characteristic orbital: s-block p-block d-block and f-block. The block names are derived from the spectroscopic notation for the value of an electron's azimuthal quantum number: sharp … A period in the periodic table is a row of chemical elements. All elements in a row have the same number of electron shells. Each next element in a period has one more proton and is less metallic ...

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