
Unsur kimia
Authored by Nesy Widyastuti
Science
10th Grade

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154 questions
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1.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Gas berbahaya yang dihasilkan dari pembakaran tidak sempurna adalah gas karbon monoksida. Penulisan kimia karbon monoksida adalah...
CO
CO2
C2O
CO3
2.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Yang termasuk ke dalam contoh unsur logam adalah.....
Besi, emas, dan seng
Besi, emas dan iodium
Carbon, nitrogen, dan oksigen
Karbon, timah, dan nitrogen
3.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Gas berbahaya yang dihasilkan dari pembakaran tidak sempurna adalah gas karbonmonoksida. Penulisan rumus kimia karbon monoksida adalah …
CO
CO2
C2O
CO3
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Rumus molekul air yaitu . . . .
H2O
NH3
CO2
C2H5
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A dan B bereaksi membentuk dua senyawa. Untuk senyawa pertama 1,4 gram A bereaksi dengan 3,2 gram B. Untuk senyawa kedua 0,7 gram A bereaksi dengan 0,4 gram B. Berapakah perbandingan unsur B dalam senyawa pertama terhadap unsur B dalam senyawa kedua?
1:1
2:1
1:2
1:4
4:1
6.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Jika diketahui nuklida , maka jumlah elektron, proton dan neutron adalah….
23 proton, 12 elektron, 11 neutron
11 proton, 11 elektron, 12 neutron
12 proton, 11 elektron, 11 neutron
11 proton, 12 elektron, 11 neutron
11 proton, 12 elektron, 23 neutron
7.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Jika pada keadaan dasar electron terakhir dari suatu atom adalah n=4; l=2; m=0; s=-1/2, maka jumlah elektron tidak berpasangan pada atom tersebut adalah…
1
2
3
4
5
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