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49 Cards in this Set
- Front
- Back
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Group |
Column, up and down |
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Period |
left and right |
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atomic weight |
-equal to number of protons and neutrons in the nucleus, calculated using the mass of each isotope present -the number under the letter on the periodic table -the average of all of the masses of the isotopes of that element |
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isotope |
2 or more forms of same element that contain equal number of protons but different neutrons , they differ in atomic mass |
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element |
substance that cannot be broken down into a simpler one by chemical means |
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compound |
substance composed of two or more elements in a fixed chemical combo (h2O pure water is a compound) |
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mixture |
contains 2 or more substances that are not chemically combined (if you mix sugar and water) air is a mixture because of the compounds that make it up |
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isomer |
compounds with the same formula but different arrangement of atoms |
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allotrope |
-2 or more different physical forms in which an element can exist -Graphite, charcoal, and diamond are all allotropes of carbon |
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x axis |
independant variable |
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y axis |
dependent variable |
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proportional intervals vs categorical |
proportional -represents numerical value, x/y scatter plot categorical -line graphs, non proportional |
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.09 x 10-3 scientific notation |
.00009
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AQI Values Good? Moderate? Unhealthy? |
Good: 0-50 AQI Moderate: 51-100 AQI Unhealthy: 100-200 AQI |
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For gases 1 mol = |
22.4 L |
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1m^3 |
1000 L |
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What is oxidation? |
losing electrons, chem process where stable compound loses electrons by oxidizing agents and becomes unstable |
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Why is Vitamin C and antioxidant? |
it gives away its electron to free radical and stop chain reaction of free radical formation |
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free radical |
uncharged molecule having an unpaired valence electron, highly reactive and can cause harmful effects |
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iodine titration |
measures amount of electrons that are given up by antioxidant |
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analyte |
chemical of interest in a sample , what you analyze ( we used vitamin c in lab) |
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titrate |
chemical added gradually to react with the analyte (we used iodine in lab) |
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indicator |
chemical that is added to indicate end point of titration (starch turned blue in lab to indicate end) |
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greenhouse effect |
the trapping of the sun's warmth in a planet's lower atmosphere due to the greater transparency of the atmosphere to visible radiation from the sun than to infrared radiation emitted from the planet's surface.
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what type of light is relevant? |
sunlight? , visible light.... IDK |
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anthropogenic factors in climate change |
burning of fossil fuels (human caused) |
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how are monomers polymerized? |
by forming covalent bonds |
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What initiates the polymerization? |
free radicals (initiator) |
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What helps the polymerization reaction? |
heat |
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What hinders the polymerization reaction? |
inhibitors |
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what inhibits polymerization? |
antioxidants (preservatives) |
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plasticizer |
no chemical bonds with polymer, only dissolve the polymer (additives) |
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crosslinker |
hydrogen bonds with polymer chains (increase elasticity) |
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triacylglycerol |
derived from glycerol and 3 fatty acids |
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fatty acid - saturated |
bad |
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fatty acid - unsaturated |
good |
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fatty acid - trans |
bad |
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nonpolar can only dissolve in nonpolar |
organic solvent |
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is water polar or nonpolar? |
water is polar |
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potato chips facts |
Even though low-fat (or no-fat) potato chips do not give fatcalories, they contain non-polar fat substitute (which isdissolved by pet-ether). This is why your results show highamount of fat in no-fat potato chips.
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Carbohydrates: starch vs cellulose |
startch: stores energy Cellulose: supports and strengthens |
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what will cause the hydrometer to float higher? |
The more the sugar, the higher the density of thebeverage –that will cause the hydrometer to float higher.
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why do no sugar drinks have more density than water? |
Even though no-sugar added beverages have no sugar, ithas different density than your water or lowconcentration sugar solution – because there are othercompounds in the beverage (like, molecules from fruit, flavorings…) that changes density.
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gene |
Genes are made of DNA, A gene consists of enough DNA to code for one protein
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genome |
genome is simply the sum total of an organism's DNA ( A, C , T and G) as bases . A genome is an entire set of genes
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why does DNA move to positive end of field? |
DNA moves toward to + end of electric fieldbecause it carries negative charges
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LDL |
fat people , fat is low in density BAD cholestrerol FHAT YOU ARE FHAT |
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HDL |
high density lipoproteins: have more proteins in molecule than low density Good cholestorl |
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BMI |
Less than 18.5= underweight 18.5-24.9= healthy 25-29.9= overweight FAAT 30 or greater= Obese |
