Huskychemistry Honors Ch 3
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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| atomic mass unit (amu) | the measuring unit for atomic masses, based upon the mass of carbon
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| atomic number | the number of protons in an atom, determines the element's identity
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| atomic mass | the mass of an atom's protons plus its neutrons
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| isotope | atoms of the same element that have different masses due to different numbers of neutrons
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| molar mass | the mass of one mole of a substance; for example, one mole of carbon has a mass of 12.01 grams
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| mole | a counting unit, 6.02 x 10 23, also known as Avagadro's number
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| law of conservation of mass | mass is neither created nor destroyed during ordinary chemical reactions
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| law of definite proportions | compounds contain the same elements in the same proportions by mass regardless of the size of the sample
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| atom | the smallest unit of an element that maintains the properties of that element
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| Democritus | ancinet Greek; idea of atoms being indivisible
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| Aristotle | ancient Greek; idea that matter was continuous and that there were no such things as atoms
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| Dalton | 1800's; created a five part atomic theory that is still in use today
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| Rutherford | gold foil experiment determined that the nucleus of an atom is small, dense, and has a positive charge
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| Thomson and Millikan | conducted experiements that determined that electrons are very small, negative, and found in all atoms
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| proton | the positive part of an atom, found in the nucleus
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| neutron | found in the nucleus of an atom, has no charge
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| electron | negative part of an atom, found outside the nucleus
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| nucleus | the center part of an atom where the protons and neutrons are located
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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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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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