Unit 2 Atoms
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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| atom | The smallest particle of an element.
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| proton | A positively charged particle in the nucleus of an atom with a mass of 1 a.m.u. It determines the identity of the atom.
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| neutron | A particle in the nucleus of an atom with no charge and has a mass of 1 a.m.u.
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| electron | A negatively charged particle that flies around the nucleus of an atom that has almost no mass.
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| nucleus | The positively charged center of an atom. This is where almost all of the atom's mass is located.
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| valence electron | The electrons located farthest from the nucleus that determines how chemically reactive the atom will be.
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| electron cloud | The area outside the nucleus of an atom where the electrons fly.
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| atomic number | The number of protons in an atom. This determines the atom's identity.
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| mass number | The total number of protons and neutrons in an atom.
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| neutral | Having no electric charge; not positive or negative.
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| neutral atom | Atoms have no electrical charge because they have the same number of electrons (-) and protons (+).
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| ion | An atom that has lost or gained an electron and now has an electrical charge (+ or -)
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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:
dmiles