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8 Cards in this Set
- Front
- Back
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What are the Base SI Units for
Mass length time temperature amount current |
Mass-kg
length-m time- s temperature-k amount-mole current-a |
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What are the common derived units for:
velocity acceleration force energy power frequency pressure |
velocity=length/time
acceleration=velocity/time force=mass x acceleration= Newton N energy=force x distance= Joule J power= energy/time= watt W frequency= 1/time= = Hertz H2 pressure=force/area==Pascal Pa |
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What is matter, substance and what does it consist of?
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Matter has mass, it has physical propeties. Subtance consists of elements which cannot be decompsed into simplest substances by chemical means and compound which means combination of elements
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Mixture of substance?
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homogeneouse: a mixture at the molecules level same properties throughout. Heterogenous, different phases are eveident.
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What is a molecule?
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is a small discrete unit of atoms bonded together
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WHat us chemical and physical change?
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chemical changes the identity of the substance and ohysical does not change the identity of the substance
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What is the atomic theory?
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all matter consists of atoms, all atoms of an element are indentical, atoms combine in whole numbers; ratios to form compounds, chemical reactions are rearrangements of atoms, atoms are indivisible
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atomic mass?
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a weighted avergae of all the naturalality occuring isotopes of an element. such as argon 36 Ar=34%
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