Chapter 8 of Chemistry live
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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| Radioactivity | the spontaneous breaking up of unstable nuclei with the emission of radiation
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| what happens when an atom loses an alpha particle | It changes into the atom 2 places before it in the periodic table and its mass number is reduced by 4.
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| what happens when an atom loses a beta particle | it changes into an atom 1 place after it in the periodic table, & the mass number stays the same
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| Half-life | the time taken for half the nuclei of an element to decay
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| Example of Alpha | Americium 241
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| Example of Beta | Carbon 14
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| Example of Gamma | Cobalt 60
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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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