Senin, 16 April 2012

SISTEM PERIODIK UNSUR (KIMIA) :)

Tabel periodik unsur-unsur kimia adalah tampilan unsur-unsur kimia dalam bentuk tabel. Unsur-unsur tersebut diatur berdasarkan struktur elektronnya sehingga sifat kimia unsur-unsur tersebut berubah-ubah secara teratur sepanjang tabel. Setiap unsur didaftarkan berdasarkan nomor atom dan lambang unsurnya.
Tabel periodik standar memberikan informasi dasar mengenai suatu unsur. Ada juga cara lain untuk menampilkan unsur-unsur kimia dengan memuat keterangan lebih atau dari persepektif yang berbeda.

Klasifikasi:

  • Golongan

Kolom dalam tabel periodik disebut golongan. Ada 18 golongan dalam tabel periodik baku. Unsur-unsur yang segolongan mempunyai konfigurasi elektron valensi yang mirip, sehingga mempunyai sifat yang mirip pula. Ada tiga sistem pemberian nomor golongan. Sistem pertama memakai angka Arab dan dua sistem lainnya memakai angka Romawi. Nama dengan angka Romawi adalah nama golongan yang asli tradisional. Nama dengan angka Arab adalah sistem tatanama baru yang disarankan oleh International Union of Pure and Applied Chemistry (IUPAC). Sistem penamaan tersebut dikembangkan untuk menggantikan kedua sistem lama yang menggunakan angka Romawi karena kedua sistem tersebut membingungkan, menggunakan satu nama untuk beberapa hal yang berbeda.
Golongan bisa dianggap sebagai cara yang paling penting dari mengklasifikasi unsur. Pada beberapa golongan, unsur-unsurnya ada yang sangat mirip sifatnya dan memiliki kecenderungan sifat yang jelas jika ditelusuri menurun di dalam kolom. Golongan-golongan ini sering diberi nama umum (tak sistematis) sebagai contoh: logam alkali, logam alkali tanah, halogen, khalkogen, dan gas mulia. Beberapa golongan lainnya dalam tabel tidak menampilkan sebanyak persamaan maupun kecenderungan sifat secara vertikal (sebagai contoh Kelompok 14 dan 15), golongan ini tidak memiliki nama umum.

  • Periode

Baris dalam tabel periodik disebut periode. Walaupun golongan adalah cara yang paling umum untuk mengklasifikasi unsur, ada beberapa bagian di tabel unsur yang kecenderungan sifatnya secara horisontal dan kesamaan sifatnya lebih penting dan mencolok daripada kecenderungan vertikal. Fenomena ini terjadi di blok-d (atau "logam transisi"), dan terutama blok-f, dimana lantinida dan aktinida menunjukan sifat berurutan yang sangat mencolok.

  • The History

Tabel periodik pada mulanya diciptakan tanpa mengetahui struktur dalam atom: jika unsur-unsur diurutkan berdasarkan massa atom lalu dibuat grafik yang menggambarkan hubungan antara beberapa sifat tertentu dan massa atom unsur-unsur tersebut, akan terlihat suatu perulangan atau periodisitas sifat-sifat tadi sebagai fungsi dari massa atom. Orang pertama yang mengenali keteraturan tersebut adalah ahli kimia Jerman, yaitu Johann Wolfgang Döbereiner, yang pada tahun 1829 memperhatikan adanya beberapa triade unsur-unsur yang hampir sama.

Beberapa triade
Unsur Massa atom Kepadatan
Klorin 35,5 0,00156 g/cm3
Bromin 79,9 0,00312 g/cm3
Iodin 126,9 0,00495 g/cm3
Kalsium 40,1 1,55 g/cm3
Stronsium 87,6 2,6 g/cm3
Barium 137 3,5 g/cm3

Temuan ini kemudian diikuti oleh ahli kimia Inggris, yaitu John Alexander Reina Newlands, yang pada tahun 1865 memperhatikan bahwa unsur-unsur yang bersifat mirip ini berulang dalam interval delapan, yang ia persamakan dengan oktaf musik, meskipun hukum oktaf-nya diejek oleh rekan sejawatnya. Akhirnya, pada tahun 1869, ahli kimia Jerman Lothar Meyer dan ahli kimia Rusia Dmitry Ivanovich Mendeleyev hampir secara bersamaan mengembangkan tabel periodik pertama, mengurutkan unsur-unsur berdasarkan massanya. Akan tetapi, Mendeleyev meletakkan beberapa unsur menyimpang dari aturan urutan massa agar unsur-unsur tersebut cocok dengan sifat-sifat tetangganya dalam tabel, membetulkan kesalahan beberapa nilai massa atom, dan meramalkan keberadaan dan sifat-sifat beberapa unsur baru dalam sel-sel kosong di tabelnya. Keputusan Mendeleyev itu belakangan terbukti benar dengan ditemukannya struktur elektronik unsur-unsur pada akhir abad ke-19 dan awal abad ke-20.

 

Kim Hyun Joong is one of my inspiration. :)

Kim Hyun Joong (Hangul: 김현중, Hanja: 金賢重) was born on 6 June 1986. He is a South Korean entertainer and the leader of boyband SS501. Kim is well-known for his role as Yoon Ji Hoo in the 2009 Korean drama Boys Over Flowers, winning Best Actor Award at the Seoul International Drama Awards 2009, and Popularity Award at the 45th PaekSang Arts Awards. He is also known for playing in the late 2010 Korean drama Playful Kiss, as Baek Seung Jo. He is a style icon in Korea, winning several icon awards.

On 8 June 2005, Kim made his entertainment debut as the leader of SS501. The group appeared on the 2006 show, Thank You For Waking Me Up where he was proven to be a heavy sleeper, and the MNet show Idol World in 2007, in which SS501 did various activities in Japan.
In May 2008, Kim joined the cast of We Got Married in episode nine. Known as the "Lettuce Couple", Hyun Joong and Hwang Bo went on to win MBC's Best Couple Award. The couple made their official exit from the show in episode 38, on 14 December 2008, due to scheduling conflicts with Boys Over Flowers.

HIS BIOGRAPY

 He dropped out of school when he decided to become a singer. During his school days, he played bass guitar in a band. During the years 2001 and 2002 when he was 14–15, while working as a waiter in a family restaurant, located at Jamsil-dong, he was introduced to a new set up management company CEO. Initially he was to debut in a 5 member group. Han Yeon of B2Y (now disbanded) was to be the Leader and Kim the maknae. While the group underwent training together, they were asked by their company to debut in China as a Hallyu project group, but the group rejected the offer and disbanded. Kim proceeded to audition for DSP Media (formerly DSP Entertainment) and became a member and leader of SS501. Kim returned to school and graduated in 2006 after debuting as a member of SS501. In 2011, he enrolled in Chungwoon University to study stage production management.[1]

2010 

Playful Kiss

In April 2010, he appeared opposite Jung Ryeo Won in the music video for Korean singer Gummy's new song "As A Man" (남자라서).
In June 2010, SS501 released an album titled Destination, produced by Steven Lee. Their title song "Love Ya" was well received, rating high in record sales and online music stores, and it went on to top Music Bank's K-Chart. However, they ended promotions after two weeks, because SS501's contract with DSP Media ended.
On 19 June 2010, he appeared at a concert in the Philippines along side BEAST.
On 28 June 2010, it was announced that Kim had officially left DSP Media and joined Bae Yong Joon's KeyEast Entertainment company.[3] Although Kim has left DSP Media he stated that SS501's activities will be top priority in their contracts[4] and definitely has not disbanded. Kim explained in an interview that, at the time, there wasn't a company that would accepted them as a whole, thus the group decided to take the chance to focus on their solo activities.
Kim played the lead role in the drama Playful Kiss, a Korean adaptation of Japanese shōjo manga Itazura na Kiss as Baek Seung Jo, an all round perfect genius with an IQ of 200, with co star Jung So Min as Oh Hani. On 7 November, Kim was interviewed by CNN's Anna Coren due to his success in Playful Kiss. Playful Kiss Special Edition is a big hit on Youtube as it is the first Korean drama to air on YouTube. Its first episode garnered 1 million views just in 5 days and it proved so popular that there is a record channel view of 7 million and 26 million total upload views, as of January 2012.
Kim was invited to perform at the 2010 Asian Games in Guangzhou as the representative of South Korea to sing "Sunshine Again" with other 4 other singers from Chinese-speaking countries.[5] In early December 2010, Kim went to Singapore and Malaysia to promote The Face Shop.

 HIS FILM :
HIS MUSIC :

  • 2005 2Shai – "She Laugh"
  • 2006 Eru – "Black Glasses"
  • 2009 Kim Joon – "Jun Be O.K"
  • 2010 Gummy – "As A Man"
  • 2011 Kim Hyun Joong – "제발" (Please)
  • 2011 Kim Hyun Joong – "Break Down"
  • 2011 Kim Hyun Joong – "Kiss Kiss"
  • 2011 Kim Hyun Joong – "Lucky Guy"
  • 2011 Kim Hyun Joong - "Marry You"
  • 2012 Kim Hyun Joong - "Kiss Kiss" [Japanese version]
  • 2012 Kim Hyun Joong - "Lucky Guy" [Japanese version]
PROFIL OF KIM HUN JOONG :

Birth name 김현중 (金賢重)
Born 6 June 1986 (age 25)
Seoul, South Korea
Origin South Korea
Genres K-pop, J-pop, Dance, R&B
Occupations Singer, Actor, Model, Dancer, MC
Instruments Guitar, Bass, Piano, Drums, Violin
Years active 2005–present
Labels DSP Media (2005–2010)
KeyEast (2010–present)
Warner Music Taiwan
(2010–present)
United Asia Management
(2011–present)
Delicious Deli Records/Universal Music Japan
(2011–present)
Associated acts SS501 (2005-present)
Website http://www.hyun-joong.com/