8th Grade Organizing Elements
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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| What did Dmitri Mendeleev discover in 1869? | A set of patterns in the properties of elements.
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| What is the atomic mass of an element? | the average mass of all isotopes in an element
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| Mendeleeve noticed that patterns appeared when he arranged the elements in what way? | In order of increasing atomic mass
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| Mendeleev's periodic table had ... blank spaces left in it, which repersented elements that had not yet been discovered. | 3
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| What does the word periodic mean? | A regular repeated pattern
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| A chart of the elements showing the repeating pattern of their properties is called the ... | Periodic table
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| A one or two letter representation of an element is called a ... | chemical symbol
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| How can an elements properties be predicted? | From the location in the peroidic table
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| Each horizontal row in the table is called a ... | period
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| Group 15 of the periodic table is the ... family. | Nitrogen
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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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