jOGOS
2nd - 10th Grade
•49 Qs
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jOGOS
Quiz
•
Chemistry, Science, Education
•
2nd - 10th Grade
•
Practice Problem
•
Hard
Caroline Ribeiro
Used 1+ times
FREE Resource
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49 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Qual o nox do enxofre em SO3
+3
-3
-6
+6
Answer explanation
The oxidation number of sulfur in SO3 is +6 because oxygen has an oxidation number of -2 and the sum of the oxidation numbers in a compound is zero.
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
Dizemos que um elemento químico sofreu redução quando há perda de elétrons, fazendo com que seu NOX seja aumentado.
Verdadeiro
Falso
Answer explanation
The statement is true because reduction involves the loss of electrons, leading to an increase in the oxidation number (NOX) of the chemical element.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A redução do NOX acontece quando o elemento doa seus elétrons a um outro elemento químico.
Verdadeiro
Falso
Answer explanation
The statement is false because reduction of NOX occurs when the element gains electrons, not donates them.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Nas transformações químicas, novas substancias são formadas e denominadas de:
Reagente
Produtos
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Dois elementos que são isótopos possuem igual número de____________.
elétrons
nêutrons
núcleons
prótons
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
O MODELO ATÔMICO ACIMA FOI PROPOSTO POR QUAL PESQUISADOR?
RUTHERFORD
SCHRODINGER
BOHR
DALTON
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
QUAL PESQUISADOR PROPÔS O ÁTOMO COMO UMA BOLA INDIVISÍVEL, ASSIM COMO A BOLA DE BILHAR?
SCHRODINGER
DALTON
RUTHERFORD
BOHR
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