Chapt 2
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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| show | electrons
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| An atom can be changed into a different isotope by adding or removing ___________ | show 🗑
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| If you change the number of ________, the atom becomes a different element. | show 🗑
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| A nitrogen atom has 7 protons, and the most common isotope of nitrogen has 7 neutrons. A radioactive isotop of nitrogen has 9 neutrons. what are the atomic numbers and mass numbers of the stable and radioactive forms of nitrogen. | show 🗑
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| show | Organisms incorporate radioactive isotopes of an elemeent into their molecules just as they do the nonradioactive isotopes, and researchers can detect the presence of the radioactive isotopes.
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| A sulfur atom has 6 electrons in its third (outermost) shell, which can hold 8 electrons. As a result, it forms _______ covalent bonds with other atoms. (#) | show 🗑
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| What is chemically nonsensical about this structure? H-C=C-H | show 🗑
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| Some people in your study group say they don't understand what a polar molecule is. you explain that a polar molecule... | show 🗑
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| A can of cola consists mostly of sugar dissolved in water, with some carbon dioxide gas that makes it fizzy and makes the pH less than 7. Describe the cola using the following terms: solute, solvent, acidic, aqueous solution. | show 🗑
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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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