Cov txheej txheem:
Video: Dab tsi yog pawg ntawm cov lus teev sijhawm?
2024 Tus sau: Miles Stephen | [email protected]. Kawg hloov kho: 2023-12-15 23:36
Muaj ntau txoj hauv kev ntawm kev faib cov ntsiab lus, tab sis lawv feem ntau muab faib ua hlau, semimetals (metalloids), thiab nonmetals. Koj yuav pom ntau pab pawg tshwj xeeb, xws li cov hlau hloov pauv, cov av tsis tshua muaj, cov hlau alkali, alkaline ntiaj teb, halogens, thiab cov roj av zoo.
Ntawm no, dab tsi yog pab pawg ntawm lub rooj zaum?
Pawg (lub sij hawm lub sij hawm)
- Pawg 1: cov hlau alkali (lithium tsev neeg) * tsis suav nrog hydrogen.
- Pawg 2: alkaline ntiaj teb hlau (tsev neeg beryllium)
- Pawg 3-12: kev hloov pauv hlau.
- Pawg 13: lub triels (boron tsev neeg)
- Pawg 14: cov tetrels (carbon tsev neeg)
- Pawg 15: pnictogens (tsev neeg nitrogen)
- Pawg 16: cov chalcogens (oxygen tsev neeg)
4 hom ntsiab yog dab tsi? Classification ntawm cov Cov ntsiab lus Peb pawg no yog: hlau, nonmetals, thiab inert gases. Cia peb saib qhov twg cov pab pawg no nyob rau ntawm lub rooj sib tham thiab sib cuam tshuam nrog lawv lub peev xwm poob thiab nce electrons. Nco ntsoov, cov cwj pwm no yog qhov yooj yim dua. Ua ntej, cov hlau.
Yog li ntawd, dab tsi yog 7 pawg ntawm lub sij hawm?
Cov ntsiab lus nthuav tawm hauv txhua qhov Periodic Table Pawg yog Gas, Liquid lossis Solid nyob rau hauv chav tsev kub thiab muab faib rau hauv pab pawg xws li: Alkali Metals, Alkaline Earth Metals, Transition Metals, Metalloids, Other Metals, Non-metals, Halogens, Noble Gases and Rare Earth Elements.
Dab tsi yog Pawg 13 ntawm lub rooj sib tham hu ua?
Pawg 13 qee zaum hu ua boron pab pawg , npe rau thawj lub ntsiab hauv tsev neeg. Cov ntsiab lus no - tsis yog qhov xav tsis thoob - nyob hauv kab 13 ntawm daim ntawv qhia hnub . Qhov no pab pawg suav nrog boron, aluminium, gallium, indium, thallium, thiab ununtrium (B, Al, Ga, In, Tl, thiab Uut, feem).
Pom zoo:
Dab tsi yog 7 ntawm daim ntawv teev sijhawm?
Cov ntsiab lus hydrogen, nitrogen, oxygen, fluorine, chlorine, bromine thiab iodine yeej tsis pom los ntawm lawv tus kheej. Lub xya, hydrogen, yog "oddball" ntawm lub rooj zaum, tawm ntawm nws tus kheej
Dab tsi yog lub ntsiab lus ntawm ib pab pawg ntawm cov lus teev sijhawm?
Nyob rau hauv chemistry, ib pab pawg (tseem hu ua tsev neeg) yog ib kem ntawm cov ntsiab lus nyob rau hauv lub sij hawm lub sij hawm ntawm cov tshuaj. Muaj 18 pawg lej nyob rau hauv daim ntawv teev sijhawm; cov kab f-block (nruab nrab ntawm pawg 3 thiab 4) tsis suav nrog
Cov pab pawg twg ntawm cov ntawv teev sijhawm twg yog cov tshuaj chlorine?
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Puas yog cov ntsiab lus uas muaj cov tshuaj lom neeg zoo sib xws yuav pom nyob rau tib lub sijhawm lossis hauv tib pab pawg piav qhia koj cov lus teb?
Qhov no yog vim hais tias cov tshuaj muaj zog nyob ntawm tsis muaj valence electrons. Raws li nyob rau hauv ib pawg tag nrho cov ntsiab lus muaj tib yam tsis muaj valence electron uas yog vim li cas lawv muaj cov tshuaj zoo sib xws tab sis nyob rau hauv ib lub sij hawm tsis muaj valence electron sib txawv uas yog vim li cas lawv txawv nyob rau hauv chemical zog
Dab tsi yog 3 lub ntsiab lus uas ploj lawm hauv daim ntawv teev sijhawm?
Tom qab ntawd nws tau pom tias yog gallium. Gallium, germanium, thiab scandium yog tag nrho cov tsis paub nyob rau hauv 1871, tab sis Mendeleev tshuav qhov chaw rau txhua tus thiab kwv yees lawv cov atomic masses thiab lwm yam tshuaj. Tsis pub dhau 15 xyoos, cov ntsiab lus "tsis ploj" tau pom, ua raws li cov yam ntxwv tseem ceeb Mendeleev tau sau tseg