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| study of composition of substances and the changes they undergo |
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| solve problems dealing with the ingredients the world is made of |
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| gain knowledge for the sake of knowledge |
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| resistance to change in motion or resistance to change in direction or rate/speed |
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Amount of matter in an object
measure of inertia
does not change from place to place |
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Measure of the force of gravity
between 2 objects
changes with location |
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| A chemical that has matter and a definite and uniform composition |
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property possessed by matter
ability to do work |
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| Potential Energy (2 things) |
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Energy due to the objects position
stored energy |
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goes in all directions
transferred by electromagnetic waves |
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| statement that gives a tentative explanation based on supported hypothesis |
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| known to happen without error, but doesn't explain how it happens |
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| stays constant in an experiment |
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Doesn't change
the reference |
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| Amount of space an object takes up |
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| measure of the average kinetic energy of the particles |
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seconds
cesium atomic clock |
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| how closely molecules are packed together |
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| Made up of more that one thing, not uniform throughout |
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| a solution made of 2 or more particles not chemically bonded together but uniform throughout |
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way of measuring the concentration of a solution
ratio between solute and solvent |
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| Intensive Physical Property |
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| a property not dependent on the amount of matter present |
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| Extensive Physical Property |
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| a property that is dependent on the amount or how much of the matter is present |
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| Law of Multiple Proportions |
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Definition
John Dalton created
found that compounds composed of some elements can occur in different ratios |
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| Law of Definate Proportions |
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Joseph Proust
stated that regardless of the amount, a compound is always composed of the same elements in the same proportion by mass |
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| describes normal particles moving at normal speed and the laws that pertain to them |
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| describes extremely small particles moving at speeds close to the speed of light |
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| the study of the interaction between matter or substances and radiant energy |
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| white light gives you an uninterrupted spectrum of light |
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| created by the light emitted when the e- drop from their excited state to lower energy states |
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| spectrum created bu determining the energy absorbed by the atom as it moves up to higher energy states |
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Albert Einstein
found when light shines on a metal surface at a very specific frequency,the metal emits electrons |
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| Wave Particle Duality of Nature |
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Louis de Broglie
described the behavior of the electron in orbit
predicts that all moving particles have wave like characteristics
and waves have properties of moving particles |
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| Heisenberg Uncertainty Principle |
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| found that it is impossible to make any measurement of an object without disturbing the object |
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| Schrodinger Wave Equation |
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| mechanical view of the atom |
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| describes the mathematical wave properties of electrons and other small particles |
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| A 3D region around the nucleus that indicated the probable location of electron |
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| a chart that organizes info about the elements location in the table allows you to predict properties |
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Triads
Made chart of groups of 3 elements that had similar properties |
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Law of octives
arranged in order of atomis mass
apperared to be a repetition of properties every eight element |
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| same properties repeat every 8th element |
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| Mendeleev's Periodic table |
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| connection between atomic mass and properties |
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| properties of elements are periodic functions of their atomic numbers |
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| force that holds 2 atoms together |
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| Bond composed of charged particles formed by losing or gaining electrons that are electrostatically held together |
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