Atomic structure vocabulary
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 | building block of matter; can be broken down into subatomic particles
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| element | made of only one kind of atom; cannot be broken down any further; found on Periodic Table
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| nucleus | center of an atom; contains protons, neutrons, electrons; contains most of the mass of an atom
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| proton | positively charged subatomic particle; found in nucleus; number of protons is called the atomic number; atomic number determines identity of the atom
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| neutron | subatomic particle with no charge; found in the nucleus of the atom; contributes of overall atomic mass, but not to atomic charge
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| electron | subatomic particle found in the electron cloud; have virtually no mass; have a negative charge; contribute to overall atomic charge, but not mass
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| atomic number | number of protons found in the nucleus of the atom; tells us the name of the element; whole number above atomic symbol on Periodic Table
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| atomic mass (mass number) | number of protons plus number of neutrons; almost all mass located in the nucleus of the atom; decimal number close to atomic symbol on Periodic Table; round to the nearest whole number for mass we use in class
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| energy shell (level) | completely surround nucleus of atom; electrons located here; specific rules apply; 2-8-8
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| valence shell (level) | outermost energy level (shell)
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| valence electrons | electrons located in the valence shell; these electrons determine an atoms level of reactivity; must be placed according to 2-8-8 rule
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| subatomic | smaller than an atom
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| electron cloud | all of the energy shells together; electrons found here; organized according to 2-8-8 rule
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| AMU | atomic mass unit; unit used for expressing atomic mass; each proton has an amu of 1 and each electron has an amu of one
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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:
Mrs. Murrell's Class
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