Tentang Suasa
Assalamualaikum,Ade sedikit pertanyaan tentang satu jenis logam campuran yaitu suasa.
Campuran emas dan perak dipanggil suasa dan banyak dibuat sebagai alat perhiasan sedari dulu hingga kini.
Adekah suasa ini mempunyai unsur yg tersendiri dalam jadual berkala ? suasa dalam bahasa inggeris dipanggil apa ?
Trima Kasih :$
http://www.click4chill.com/wp-content/uploads/2010/07/periodic_table.gif Aku jumpe kat wiki -
Electrum is a naturally occurring alloy of gold and silver, with trace amounts of copper and other metals. It has also been produced artificially. The ancient Greeks called it 'gold' or 'white gold', as opposed to 'refined gold'. Its color ranges from pale to bright yellow, depending on the proportions of gold and silver. The gold content of naturally occurring electrum in modern Western Anatolia ranges from 70% to 90%, in contrast to the 45–55% of electrum used in ancient Lydian coinage of the same geographical area. This suggests that one reason for the invention of coinage in that area was to increase the profits from seignorage by issuing currency with a lower gold content than the commonly circulating metal.
Electrum was used as early as the third millennium BC in Old Kingdom Egypt, sometimes as an exterior coating to the pyramidions atop ancient Egyptian pyramids and obelisks.
Electrum was also used in the making of ancient drinking vessels and coins.
Electrum consists primarily of gold and silver but is sometimes found with traces of platinum, copper and other metals. As a result, electrum is a good conductor of electricity.
Analysis of the electrum composition in ancient Greek coinage dating from about 600 BC shows that the gold composition was about 55.5% in the coinage issued by Phocaea. In the early classical period, the gold composition of electrum ranged from 46% in Phokaia to 43% in Mytilene. In later coinage from these areas, dating to 326 BC, the gold composition averaged 40% to 41%. In the Hellenistic period electrum coins with a regularly decreasing proportion of gold were issued by the Carthaginians. In the later Roman (eastern Roman) empire controlled from Constantinople, the purity of the gold coinage was reduced, and an alloy that can be called electrum began to be used.
Suasa ni sejenis alloy kan, jd die xder 1 unsur je dlm periodic table tu...Main substance die Aurum(Au)-gold- dgn Argentum(Ag) -silver-
aku teringat biler xperiment pakai silver ni wajib sume muka tangan berkilat mcm cermin...hihihihi;P Reply 2# BiancoFisso
tapi kalau Silver (Argentum) Chloride boleh buat taik lalat..2 minggu jugak baru boleh hilang..:) err so suasa ni dalam bahasa omputeh dipanggil apa yek ? Reply 4# winamp05
an alloy laa..campuran logam panggil alloy
ermm...tapi kan nape nak locate/carialloy kat jadual berkale , ye saudara, sebab er..jadual berkalau tu well untuk 'unsur/element'setahu saya je ..dan bukan untuk sebatian ?/ compounds? ReplyBiancoFisso
tapi kalau Silver (Argentum) Chloride boleh buat taik lalat..2 minggu jugak b ...
cyclotron Post at 13-5-2011 15:07 http://mforum2.cari.com.my/images/common/back.gif
ni bukan bahan utama dalam film kan? yg foto tu kan , bahan yang sensitif pada cahaya.. bukan bronze ke ???? nak tanyer yer
white gold ...versus gold ? white gold unsur apa dalam periodic table? dan ia bukan gold as in merujuk sifat emas kan?
kalau emas boleh pajak nilai tinggi white god has no value tapi mahal je kan?
kenapa orang panggil 'gold' juga tu yg i confuse sikit tu ...
ia platinum kan? nak tanyer yer
white gold ...versus gold ? white gold unsur apa dalam periodic table? dan ia buk ...
mbhcsf Post at 19-5-2011 01:50 PM http://mforum.cari.com.my/images/common/back.gif
agaknya sebab ianya beharga dan mahal kot. tu yg org panggil gold jugak tu. macam pisang lar..... ade pisang emas sebab kaler dan sedap dan mahal. macam madu. apa apa yg manis mesti nak kait dengan madu. agaknye je la kot. hehehe..... Replywinamp05
an alloy laa..campuran logam panggil alloy
ermm...tapi kan nape nak ...
mbhcsf Post at 19-5-2011 01:45 PM http://mforum.cari.com.my/images/common/back.gif
hehehe... masa tu tak berapa paham lagi pasal unsur dan campuran ni. bila dah baca artikel korang baru le paham apa benda tu, fungsi jadual berkala tu pun bukannya aku paham sangat pun fungsi dia. keh keh keh ....... la ni baru nampak jelas dan nyata. bukan bronze ke ????
mbhcsf Post at 19-5-2011 01:48 PM http://mforum.cari.com.my/images/common/back.gif
bronze bukan gangsa ke ? suasa nie org laki je kan pakai kan?..bile la orang nk bagi cincin mas 916<24 kat i..platinum pok ok gak lagi mahal dari mas ,mas puteh boleh la asalkan peratus platinum atau dan silver tu kurang sikit..suasa,zulian i xnak,pastu kalau berlian tu biar besar buah anggur.(ini isi ati sume wanita's tau){:2_74:} what is 'suasa' in english? i mean other than alloy? tapi yg menarik ialah carbon , kan? who knows kan Allah maha kuasa
daripada alotrope dia lah ....ada pelbagai bentuk sebab susunan atom jer
arang, grafit, diamond
silikon pula = pearl :$
i mean nampak tak unsur kumpulan 4 ni unique suasa nie org laki je kan pakai kan?..bile la orang nk bagi cincin mas 916
areenarena Post at 19-5-2011 09:16 PM http://mforum.cari.com.my/images/common/back.gif
berlian nak wat hapa, kalau emas okey lagi, sesak sesak nanti buleh mintak gadai. keh keh keh :lol::lol::lol: tapi yg menarik ialah carbon , kan? who knows kan Allah maha kuasa
daripada alotrope dia lah ....ad ...
mbhcsf Post at 20-5-2011 03:47 AM http://mforum.cari.com.my/images/common/back.gif
kayu bakau pun cikgu aku kata dulu makin lama makin keras dan jadik berlian kalau berjuta tahun. betul ke ? what is 'suasa' in english? i mean other than alloy?
mbhcsf Post at 20-5-2011 03:45 http://mforum.cari.com.my/images/common/back.gif
tgk kat wiki die kata electrum kayu bakau pun cikgu aku kata dulu makin lama makin keras dan jadik berlian kalau berjuta tahun. ...
winamp05 Post at 20-5-2011 08:40 http://mforum.cari.com.my/images/common/back.gif
dalam kayu ader carbon ea? xtaw ponnn...
tp aku tringt lecturer aku ckp, skrg org tgh cr cara alter bonding graphite tu...ne taw leh tuka jd diamond...kaya wooo dalam kayu ader carbon ea? xtaw ponnn...
tp aku tringt lecturer aku ckp, skrg org tgh cr cara a ...
BiancoFisso Post at 20-5-2011 03:19 PM http://mforum.cari.com.my/images/common/back.gif
dalam bakau tu ada carbon.
dalam arang ada carbon dak ? dalam bakau tu ada carbon.
dalam arang ada carbon dak ?
winamp05 Post at 20-5-2011 15:26 http://mforum.cari.com.my/images/common/back.gif
haha...aah ek...logik gak, berjuta2 taun blh tuka jd diamond...tp, kene tgk environment gak kot...xkan sng2 boley jd diamond...
Pages:
[1]
2