2 SÉRIE REC 01 1 TRIM
Quiz
•
Chemistry
•
11th Grade
•
Practice Problem
•
Medium
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Complete: Na ligação covalente, os elementos _______ compartilham elétrons entre si.
Metálicos
Não-metálicos
Gasosos
Líquidos
2.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Complete: Na ligação iônica, metais tendem a _______ elétrons.
Ganhar
Perder
Compartilhar
Nenhuma das anteriores
3.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Complete: A teoria do octeto afirma que os átomos buscam atingir a configuração de um _______.
Metal
Gás nobre
Não-metal
Líquido
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Um composto com fórmula A2B3, apresenta, em seus átomos no estado normal, nº de elétrons na última camada, respectivamente:
2 E 3
3 E 6
3 E 2
6 E 2
5.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Quando um elemento químico Aℓ (Z = 13) se combina quimicamente com o elemento S (Z = 16), a fórmula e a ligação são, respectivamente:
Aℓ3S2; iônica
Aℓ2S3; iônica
AℓS; covalente
Aℓ2S; covalente
6.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
Aquecido a 800 °C, o carbonato de cálcio decompõe-se em óxido de cálcio (cal virgem) e gás carbônico. A equação corretamente balanceada, que corresponde ao fenômeno descrito, é:
(Dado: Ca — metal alcalino-terroso.)
CaCO3 → 3 CaO +CO2
CaCO3 → CaO +2 CO2
CaCO3 → CaO +CO2
2 CaCO3 → CaO +CO2
7.
MULTIPLE CHOICE QUESTION
45 sec • 5 pts
A equação 2 Mg(OH)2 + x HCℓ → 2 MgCℓ2 + 4 H2O estará balanceada se x for igual a:
8
6
2
4
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