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atomic mass | the wigth of an atom as the mass wigth.
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atom | the smallest unit of matter.
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scintific evidence | it is usualy accepted by scintific evidence.
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protons | it is particle of an atomm found inside the nucles.and it is positive chrged
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neutrons | it is a particle of an atom found in sidethe nucleus.
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electrons | it is a particle of an atom found out side the nucleus.and itis negative charged.
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mass number | the number of atomic=the number of protons=the number of electron.
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nucleus | the center part of an atom that contain most of the massand it consists of protons and neutrons.
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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.
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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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