
Halveringstid och kol-14
Authored by Rebecca Stafford
Physics
7th - 9th Grade
Used 32+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
________ är den tid som gått när hälften av ett radioaktivt ämnes kärnor har sönderfallit.
5 730 år
Kärnklyvningstid
Halveringstid
Sönderfallstid
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Man kan använda halveringstid för att mäta:
hur länge sedan en organism dog
hur snabbt ett radioaktivt ämnes kärnor faller sönder
hur snabbt kärnklyvningsreaktionen sker
hur stor en organism var när den dog
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
En kolatom kan ha ____ neutroner.
5
6
7
8
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Alla levande organismer innehåller oerhört många:
radioaktiva ämnen
metalljoner
kolatomer
kol-14 atomer
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ett levande träd innehåller ______ kol-14 än döda träd från stenåldern.
lika mycket
mindre
mer
hälften så mycket
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
En kolatom har ___ protoner och kan ha ___ bindningar.
14, 8
8, 2
12, 6
6, 4
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Kol-14 har halveringstid 5 730 år. Det betyder att 12 g kol-14 efter 5 730 år skulle innehålla ______ kol-14 atomer.
6 g
12 g
24 g
0
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