
SOAL POSTES EKSKUL OLIMPIADE KIMIA
Authored by Dina Laurina
Chemistry
1st - 10th Grade
Used 3+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Didalam periode ketiga sistem periodik dari Na ke Ar, atom unsur pertama mempunyai elektron terluar...
a. 1s
b. 3s
c. 2s
d. 3p
e. 2p
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Unsur-unsur periode tiga yang tergolong nonlogam adalah...
a. Na, Al, Si
b. Al, Si, P
c. Na, Mg, Al
d. P, S, Cl
e. Si, P, S
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Aluminium banyak digunakan untuk membuat alat-alat rumah tangga karena aluminium merupakan logam yang...
a. Aktif dan sangat keras
b. Ringan dan tahan korosi
c. Lunak dan mengkilap
d. Aktif dan bersifat magnet
e. Rapuh dan mudah diperoleh
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Unsur-unsur periode tiga dari Na ke Cl memiliki sifat-sifat yang berubah secara periodik, kecuali sifat...
a. Elektronegativitas
b. Warna
c. Energi ionisasi
d. Keasaman
e. Oksidator
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Unsur periode tiga yang bersifat pengoksidasi paling kuat adalah...
a. Silikon
b. Aliminium
c. Klorin
d. Magnesium
e. Natrium
6.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
Beberapa sifat unsur sebagai berikut:
1) Titik didih tinggi
2) Titik lebur rendah
3) Dapat membentuk senyawa kompleks
4) Diamagnetik
5) Paramagnetik
Sifat unsur transisi periode 4 ditunjukkan oleh...
a. 1,2,3
b. 1,3,5
c. 2,3,4
d. 2,3,5
e. 3,4,5
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Sifat-sifat unsur sebagai berikut.
1) Memiliki beberapa bilangan oksidasi
2) Pada suhu kamar, berbentuk gas
3) Membentuk senyawa berwarna
4) Sukar bereaksi (inert)
5) Memiliki energi ionisasi rendah
Sifat-sifat unsur transisi di tunjukkan oleh nomor ...
a. 1 dan 2
b. 1 dan 3
c. 2 dan 4
d. 3 dan 5
e. 4 dan 5
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