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Ch 1 Lecture
| Question | Answer |
|---|---|
| What is the Kinitic Molecular Theory | Particles of matter are always moving The kinetic energy (speed) of the particles increases as the temperature increases |
| What is the extensive property | depends on the amount of matter present ex. volume |
| What is intensive property | depends on the identity of the object, not the amount |
| Describe a solid | very low KE- Particles vibrate but don't move around fixed shape fixed volume |
| Describe a liquid | Low KE - particles move around but are still close together no fixed shape fixed volume |
| Describe a Gas | High KE- particles move around freely no shape or volume |
| Describe Plasma | Very high KE- particled collided to make charged particles gas-like ex: stars, floursent light blubs |
| What is the Bose- Einstein Condensate | atoms mount on each other |
| examples of heterogenous mixtures | pepper, paint |
| Homogenous mixtures | solution, salt water, tea |
| what is an element | A pure substance, composed of identical atoms ex: copper, aluminum foil |
| what is a compound | a pure substance, composed of 2 or more elements in a fixed ratio, properties differ from those individual elements ex: table salt co2 iconic vs molecular compounds |
| what is the law of definite composition | a given compound always contains the same fixed ratios of elements |
| what id the law of multiple proportions | elements can combine in different ratios to form different compunds |
| what is a mixture | variable combination of 2 or more pure substances can be seprated by physical means distillation,density, fillteration,iling magnent |
| what is a solution | a homomgenous mixture , very small particles,no Tyndale effect , parrticles don't settle ex: rubbing alchol , salt water |
| what is a collid | heterogenous mixture, medium sized particles, Tyndale effect, particles don't settle ex: milk, mannoyaise, fog |
| hat is the tyndall effect | Light is scattered by collid particles suspended in a clear substance ex: gelatin in water = collid salt in water = solution |
| at is a suspension | heterogenous mixture, tyndall effect, rge particles, particles don't settle ex: lemonade , muddy water, Italian dressing |
| example extensive | volume mass |
| example of intensive | boiling point, density, conductivity |
| what is a physical property | can be observed withouth changing the identity of the substance |
| what is a chemical property | describe the ability of a substance to undergo a changes in identity |
| examples physical | melting point, magnetic, density |
| example chemical | flammable, tarnishes in air |
| what is a physical change | changes the form of the substances but without changing its identity and properities |
| what is a chemical change | changes the identity of a substance , and diffrenet properties |
| signs of a chemical changes | change in color, odor, formation of a gas and a solid, change in light and heat |
| chemical changes / | burning a log, rusting iron |
| physical ? | melting ice , grinding spices, dissolving in water |
| How is the periodic table set up | group (families |
Created by:
BB2424
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