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17 Cards in this Set
- Front
- Back
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Who coined the term Atomos? |
Democritus |
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Building block of the universe |
Atoms |
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All particles are made up of small particles called? |
Atoms |
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D's atomic theory : Atoms of an element are the same but _________ |
but they differ from atoms of the same elements. |
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True/ False : In an ordinary chemical reaction atoms are neither destroyed nor created. Why? |
True, they only rearrange themselves. |
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What is stated in the "Law of Conservation of mass"? By whom? |
"The total mass of substances present at the end of a chemical process is the same as the mass of substances present before the reaction took place" by Antoine Laviosier |
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True/ false: Compounds are composed of atoms of more than one element. What law supports this statement? And by whom? |
True "Law of definite proportions" and "Law of multiple proportions" by Joseph Proust |
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What are the only particles that have a charge? |
Protons and electrons? |
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Mass of Proton |
1.0073 |
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Mass of Neutron |
1.0087 |
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What particles cointain almost the same mass? |
Proton and neutron |
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Atoms of the same element with different masses are called? |
Isotopes |
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True/ false: Isotopes does not have different number of neutrons |
False |
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A systematic catalouge of elements |
Periodic table |
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The rows in the periodic table |
Periods |
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Columns in the periodic table |
Periods |
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What are the 5 groups in the periodic table? |
Alkali metals Alkaline Earth metals Chalcogens Halogens Noble gases |
