Átomos e iões
Quiz
•
Chemistry
•
9th - 10th Grade
•
Practice Problem
•
Hard
Anabela Viegas
Used 7+ times
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5 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
O oxigénio possui três isótopos estáveis.
Indica, respetivamente, o número de protões, neutrões e eletrões existentes no isótopo O-18
18, 10, 8
10, 8, 8
8, 8, 8
8, 10, 8
2.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
A carga nuclear do O-16 é:
+8
+16
-8
-16
3.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
A carga da nuvem eletrónica do O-17 é:
-8
+8
-17
+17
4.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
É possível sintetizar átomos de oxigénio que não existem na natureza, como, por exemplo, O-12 ou O-20.
Qual a carga nuclear do átomo O-20?
+8
+20
-20
-8
5.
MULTIPLE CHOICE QUESTION
30 sec • 2 pts
O cálcio é o quinto elemento mais abundante na Terra. Tem um papel fundamental na constituição do ser humano e está presente em alguns alimentos. Sabe-se que o número atómico deste é 20 e o número de massa 40. Atendendo a que tem tendência a formar um ião dipositivo, quantos eletrões tem o ião cálcio?
18
22
40
38
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