Chapter 12 - The Periodic Table
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Who is the father of the periodic table? | Dmitri Mendeleev
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| periodic | having regular repeated pattern
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| periodic law | the chemical and physical properties of elements are periodic functions of their atomic numbers
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| period | each horizontal row on the periodic table
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| group | a column of elements of the periodic table
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| alkali metals | group 1; 1 electron in the outer shell; very reactive; sodium potassium lithium
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| alkaline-earth metals | group 2; 2 electrons in outer shell; reactive; beryllium magnesium calcium
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| halogens | group 17; 7 electrons in outer level; very reactive; halogen, chlorine, iodine
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| noble gases | group 18; non reactive; neon helium argon
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| Dmitri Mendeleev | constructed the first periodic table
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| metals | most elements are this and are to the left of the zigzag line; few electrons in ourte shell; mostly malleable shiny ductile and good conductors
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| nonmetals | right of line; almost a complete set of electrons; most are gases at room temp.; poor conductors; not shiny; not malleable or ductile
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| metalloids | aka semiconductors and border the zigzag line; 1/2 set of electrons; sometimes act like metals and sometimes like nonmetals
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| in the modern periodic table the elements are arranged in order of increasing | atomic number
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| a _______ is a representation of an element usually consisting of one or two letters | chemical symbol
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| How is the reactivity of elements related to valance electrons in atoms? | the number of valance electrons in an atom of an element determines many properties of that element including the ways in which the atom can bond with other atoms
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| What does the periodic table tell you about the elements? | the periodic table reveals the underlying atomic structure of atoms including the arrangement of the electrons
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| electron dot diagram | this includes the symbol of an element surrounded by dots representing the number of valence electrons
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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