Periodic Table Video
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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| Define allotrope | Elements that come in different forms
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| Example of an allotrope | Carbon
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| Name 9 physical characteristics of elements | color, odor, state, solubility, malleability, ductility, freezing point, melting point, melting point
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| Who was given credit for creating the periodic table? | A Russian scientist named Dmitri Mendeleev
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| Why was Dmitri Mendeleev given credit for discovering the table? | He predicted almost accurate properties for elements that had not yet been discovered.
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| What was Mendeleev's table based on? | Increasing atomic mass
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| What is the current table based on? | Increasing atomic number
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| Who changed the table? When? | A British scientist named Henry Moseley in 1913
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| Who was the German scientist who was working on creating the table around the same time as Mendeleev? | Lothar Meyer
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| Define atomic number | The number of protons in an atom's nucleus
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| Define atomic mass | The number of neutrons and protons (nucleons) in an atom's nucleus.
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| What are vertical columns in the table called? | Groups or families
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| How many families are there in the table? | 18
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| What are the horizontal rows in the table called? | Periods
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| How many periods are in the table? | 7
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| What is Group 1 called? | alkali metals
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| What is Group 2 called? | alkaline earth metals
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| What is Group 17 called? | halogens
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| What is Group 18 called (both names)? | inert gases or noble gases
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| What are elements located left of the staircase called? | metals (besides hydrogen)
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| What are the elements located to the right of the staircase called? | non-metals
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| What are the elements that border the staircase called? | metalloids (besides aluminum and polonium)
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| How many metalloids are there? | 7
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| What are the large group of elements in the center of the table (Groups 3-12) called? | transition metals
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| What are the elements located at the bottom of the periodic table called? | rare earth metals
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| How many elements are there? | 118
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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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Created by:
16bcleary
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