KERADIOAKTIFAN
Quiz
•
Science
•
7th - 9th Grade
•
Practice Problem
•
Hard
NORMAH DILLAH
Used 64+ times
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20 questions
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1.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Antara berikut, yang manakah membentuk ion positif?
Bilangan proton-10, Bilangan elektron -12
Bilangan proton-15, Bilangan elektron-15
Bilangan proton-23, Bilangan elektron -21
Bilangan proton-19, Bilangan elektron -21
2.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Rajah di atas menunjukkan struktur atom. Apakah cas bagi elektron?
Positif
Negatif
Neutral/ tiada cas
Neutron
3.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Bagaimanakah ion positif (kation) terbentuk?
Apabila atom menerima elektron.
Apabila atom mendermakan elektron.
Apabila atom berkongsi elektron.
Apabila atom mendermakan proton.
4.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Sinaran alfa dan gamma masing-masing boleh dihalang oleh sehelai kertas dan sekeping aluminium.
Apakah bahan yang boleh menghalang sinar gama?
Zink
Aluminium
Timah
Plumbum
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nukleon terdiri daripada ..........
Nukleus dan elektron
Neutron dan elektron
Neutron dan proton
Nukleus dan proton
6.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Suatu atom adalah ............... dari segi cas kerana bilangan proton sama dengan bilangan elektron, cas bersih ialah sifar.
positif
neutral
negatif
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Separuh hayat iodin ialah 6 hari. Suatu sampel mengandungi sejumlah iodin tertentu. Selepas 18 hari, hanya 9 g iodin yang tinggal. Berapakah jisim asal iodin tersebut?
18 g
36 g
72 g
144 g
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