
ulangan harian inti atom dan radioaktivitas
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Physics
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University
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Roos Umar
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14 questions
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1.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Suatu atom X mempunyai 42 proton, 42 elektron, dan 65 netron. Simbol
untuk atom ini adalah ....
2.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Apabila pasangan kedua unsur memiliki nomor massa yang sama,tetapi nomor atomnya berbeda ,kedua unsur tersebut termasuk
Isokhorik
Isotop
Isoton
Isobarik
isobar
3.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Massa inti atom adalah 40,078 sma. Jika massa proton = 1,0078 sma dan neutron = 1,0087 sma, defek massa pembentukan adalah ….
0,165 sma
0, 252 sma
0,262 sma
0,320 sma
0,330 sma
4.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Massa inti magnesium 12Mg24 adalah 23,985 sma. Massa proton = 1,0078 sma, massa neutron = 1,0086 sma dan 1 sma setara dengan 931,5 MeV, maka besar energi ikat inti 12Mg24 adalah…
199,27 MeV
197,29 MeV
172,92 MeV
127,29 MeV
122,27 MeV
5.
MULTIPLE CHOICE QUESTION
5 mins • 1 pt
Jika massa = 2,014 sma, massa = 3,016 sma, massa partikel = 4,0026 sma dan massa neutron = 1,0084 sma maka energi ikat yang dihasilkan adalah... (1 sma = 931 meV)
18,62 MeV
17,69 MeV
16,76 MeV
15,73 MeV
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Perhatikan pernyataan berikut !
1) Energy sebelum dan sesudah reaksi sama
2) Momentum sebelum dan sesudah reaksi berbeda
3) Jumlah nomor massa sebelum dan sesudah reaksi sama
4) Jumlah nomor atom sebelum dan sesudah reaksi berbeda
Dalam reaksi inti harus memenuhi syarat yang ditunjukan oleh angka
1) dan 2)
1) dan 4)
1) dan 3)
2) dan 4)
3) dan 4)
7.
MULTIPLE CHOICE QUESTION
3 mins • 1 pt
Suatu unsur 235X90 dapat memencarkan 4 kali sinar α (2 He4 ) sehingga terbentuk unsur Y.Banyaknya neutron pada unsur Y adalah …
129
132
135
137
235
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