Chapter 19
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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| radioactive element | elements that emit alpha, beta or gamma radiation
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| alpha particle | two protons and two neutrons or a nucleus of a helium atom
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| beta particle | an electron ejected by an atomic nucleus
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| gamma radiation | extremely energetic form of radiation with no charge and no mass
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| strong nuclear force | very strong force that holds the nucleus together
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| transmutation | when one element changes to another by emitting an alpha or beta
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| half-life | time needed for half the radioactive atoms to decay
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| fission | splitting of atomic nucleus into parts; releases energy
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| chain reaction | occurs when the product of the reaction starts another reaction
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| fusion | small nuclei fuse together producing energy
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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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