Chemistry studyguide Word Scramble
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Question | Answer |
Who organized elements by their masses from least to greatest in 1864? | john newlands |
Who created the system that we use now for the periodic table in 1869? | dmitri mendeleyev |
What did mendeleyev organize the elements by? | atomic masses and properties |
What happened in 400 BC? | greek philosophers were trying to figure out what things are made of |
Whos credited for the idea of atomism? | leucippus |
What does atom mean? | uncutable |
What happened to the idea of atomism? | it was ignored til the 1500s |
How many families are there in the periodic table? | 10 |
What are the families called? | alkali metals, alkali earth metals, halogens, noble gases, metals, nonmetals,transition metals, metalloids,lanthanides,actinides |
What are some characterisitcs of metalloids? | have properties of metals and nonmetals; used in comp. and electronics |
What are 3 examples of metalloids? | boron, germanium, antimony |
Whats boron used in? | helps mantain normal cell function |
Whats germanium used in? | as a semiconductor |
Whats antimony used in? | infrared detectors |
What are some characteristics of halogens? | very electronegative;bonds easily with alkaline metals |
what are 3 examples of halogens? | flourine,chlorine,idodine |
Whats flourine used in? | rocket fuels |
whats chlorine used in? | to disinfect pools |
whats idodine used in? | treat eye infections |
What are some charctersics of noble gases? | unreactive; bonds easily with alkaline metals |
What are 3 examples of noble gases? | helium,neon,xenon |
Whats helium used in? | breathing mixture for deep sea divers |
Whats neon used in? | glow sticks |
Whats xenon used in | electron tubes |
What are some characteristics of lanthanides? | produce spark; rare earth elements |
What are 3 examples of lanthanides? | europium,samarium,terbium |
whats europium used in? | red color in tvs |
Whats samarium used in/for? | pain killer medicine |
whats terbium used in/for? | lasers |
What are some characteristics of actinides? | used nuclear energy; very radioactive |
What are 3 examples of actinides? | califormium, fermium, einsteinium |
whats califormium used in? | moisture gauges |
what are fermium and einsteinium used in? | they have no uses so far |
What are some characteristics of alkali metals? | very reactive in water; electropositive |
what are 3 exampls of alkali metals? | lithium, sodium , potassium |
Whats lithium used in? | batteries |
whats sodium used in? | table salt |
whats potassium used in? | potassium cyanide |
What are some characteristics of alkali earth metals? | mallable; used in fireworks |
What are 3 examples of alkali earth metals? | magnesium, calcium, beryllium |
whats magnesium used in? | bombs |
whats calcium used in? | to dry things |
whats beryllium used in? | radiation windows |
What are some characteristics of transition metals? | hard and dense; used in construction |
what are 3 examples of transition metals? | platinum, silver, mercury |
whats platinum used in? | catalytic converter |
whats silver used in? | jewelry |
whats mercury used in? | batteries |
what are some characteristics of metals? | good conductors of electricity; good conductors of heat |
what are 3 examples of metals? | aluminum,tin,lead |
whats aluminum used in? | kitchen pots |
whats tin used in? | kitchen utensils |
what lead used in? | tennis racket |
what are some characteristics of nonmetals? | poor conductors of heat and electricity, elements of life |
what are 3 examples of nonmetals? | hydrogen, carbon, oxygen |
whats hydrogen used in? | hydrochloric acid |
whats carbon usedin? | base for ink |
What does chemistry mean? | the study of the composition and properties of matter and the changes it undergoes |
what are atoms? | smallest parts of elemnt |
whats a proton? | positively charged particle in atoms nuclues |
what are electrons? | negatively charged particles |
what are nuetrons? | particles that have the same mass as protons but have a nuetral charge |
whats an element? | matter made of elements of only one kind |
whats atomic mass? | the weighted average mass of the isotopes of an element |
whats an atomic number? | the number of protons in the nucleus of each atom of that element |
what did the alchemist hennig brand discover? | phosphorus |
how was the microwave discovered? | in WW2 workers would warm themselves next to magnetron machines and one time someone noticed that their candy bar melted |
Why is marie curie a famous chemist? | she worked with radioactivity |
whos antoine lavoisier? | "father of chemistry" discovered oxygen |
whos linus pauling? | worked on chemical bonding |
what was john daltons atomic theory? | all matter is made up of tiny building blocks, atoms, that cant b created or destroyed; atomic model-> O |
what was william crooks atomic theory? | atom contained charged particle O(+-) |
what was jj thompsons atomic theory? | atoms contained equal numbers of charged particles, making it nuetral |
whats ernest rutherfords atomic theory? | the atoms nucleus was positive and was surrounded by negativly charged electrons |
whats niehs bors atomic theory? | electrons orbit nucleus in circular pattern (electron cloud theory) |
what was the 1st chemical reaction discovered? | fire |
whats alchemy? | the science of changing cheap metals into expensive metals. :philosophers stone; urine was important |
whats an isotope? | same element, different number on nuetrons. and different atomic mass |
how many isotopes does carbon have and what are they called? | 2; carbon 12 and carbon 14 |
how many hydrogen isotopes are there and whats their names? | 3; hydrogen 1, hydrogen 2, hydrogen 3 |
when is a shell considered full? | when there's 8 electrons |
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