UJIAN STRUKTUR ATOM
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Chemistry
University
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20 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Bilangan kuantum utama menurut teori atom mekanika kuantum menyatakan....
Kecepatan pergerakan elektron
Tingkat energi elektron dalam atom
Kedudukan elektron terhadap elektron lain
Energi atom hidrogen
2.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Jumlah maksimum elektron dalam subkulit d adalah ...
2
18
6
10
3.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Unsur X memiliki konfigurasi elektron: 1s2 2s2 2p6. Harga keempat bilangan kuantum elektron valensi dari atom X adalah ....
n = 2, l = 1, m = 1, dan s = –1/2
n = 2, l = 0, m = 0, dan s = –1/2
n = 3, l = 0, m = 0, dan s = +1/2
d. n = 3, l = 1, m = –1, dan s = +1/2
4.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Sistem periodik unsur sebagai suatu sistem pengelompokan unsur yang sistematis seperti sekarang ini semula diawali oleh . . .
Thomson, Rutherford dan Niels Bohr
Mendeleev, Pauli, dan Boyle
Einstein, Thomson, dan Niels Bohr
Dobereiner, Newlands dan Mendeleev
5.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Di antara nama golongan dan nomor golongan berikut ini yang sesuai adalah...
transisi, golongan VIIIA
alkali, golongan IA
gas mulia, golongan VIIA
halogen, golongan IIA
6.
DRAG AND DROP QUESTION
1 min • 2 pts
Jawablah pertanyan berikut dengan cara meletakan pilihan jawaban yang tepat pada kotak yang disediakan!
Ernes Rutherford melakukan penelitian dengan menggunakan batu uranium yang terus memancarkan radiasi, hasil penelitian yang dilakukannya diperoleh bahwa uranium memancarkan tiga jenis sinar yakni sinar alfa, beta dan gama. Sinar alfa dan beta mengalami pembelokan karena medan listrik. Berdasarkan video yang ditayangkan, arah pembelokan yang berlawanan terjadi dikarenakan (a) dan (b)
7.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
Menurut postulat Bohr, setiap elektron dalam atom menghasilkan inti dalam lintasan tertentu yang stasioner disebut…
Orbit
Gaya sentripetal
Gaya elektrostatik
Gaya gravitasi
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