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Intro Things to know
chem and phys
| Question | Answer |
|---|---|
| chemistry | the study of composition, structure, properties, and reactions of matter |
| convection | transphers by currents with fluid. (boiling water, air current, heating of a room |
| friction | a force that opposes the motion of objects that touc h as they move past each other( can transpher electrons through this) |
| atomic number | number of protons(gives you number of electrons as well). gives you protons in an atom |
| nutron | has no charge in found in the nucleus. subtromical particle |
| density | the ratio of a material's mass to it's volume |
| celcius | freezing point is zero, boiling point is 100 |
| alloy | a mixture of two or more elements at least one which is metal, that has charecteristics properties of metals |
| mass number | the sum of the protons and neutrons in the nucleus |
| atomic mass unit | one twelth the mass of a carbon -12 atom(AMU) |
| acid | a coumpound that produces hydronium when dissolved in water, a protondonor. |
| farhenhit. | freezes at 32 degress, boils at 212 degress |
| dissolving | a breakdown of cystal |
| frequency | the number of complete cycles per unit of time for a periodic motion |
| length | the straight line distance between two points |
| base | a coumpound that produces hydroxide ions. When dissolved in water; a proton accepter. |
| matter | has mass which encludes atoms and other particles |
| physics | the study of matter and energy and the interactions between the two forces of motion |
| barometer | instrument used to messure atmospheric pressure. (Uses water, air, and mecury) |
| boiling | when vapor and pressure in equal to atmospheric pressure |
| inertia | the tendency of an object to resist a change in motion |
| ionic | kind of bonding where an atom shares its electrons as the other atom gains electrons when bonding. Is always metals with non-metals. |
| compound | a substance that is made from 2 or more simpilier substances and can be broken down into simplier substance |
| mass | the amount of matter in an object |
| salt | ionic compound. formed when acids react with bases |
| evaporations | happens when temperature is below substances boiling point |
| covalent bonding | when they do not share atoms equally( is always non metals with non metals) |
| weight | the force of gravity acting on an object |
| gravity | the attraction between two any 2 objects because of their masses |
| condinsation | the phase change in which a substance changes from a gas or vapor to a liquid. (think of clouds raining) |
| radioactivity | the process in which an unstable atomic nucleus emits charged particles and energy( think of clouds setting of electricity or lighting) |
| Galileo | studies how gravity produces constant acculation, moving objects not subject to friction would continue to move indefineity. |
| Newton | built work on scientist. Came up with laws of motion. Law of Inerertia: a state of a motion of an object will not change as long as force acting on the object is zero 2nd Law: acceleration of an object is equal to the net force acting on it divided by o |
| Einstein | law of relativity: came up with two ways to measure mass with same value |
| Curie | discovered the radioactivity elements radium and polonium advance study of radio activity |
| Law of Matter | matter cannot be created nor destroyed in an isolated system |
| Chemical equations. | chemical reaction in which the reactions and products are expressed as formulas |
| atomic mass | the electrons and protons added together( when subtracted will give you your neutrons) |
Created by:
kelseya123
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