
aula 3 2 ano
Passage
•
Chemistry
•
12th Grade
•
Practice Problem
•
Hard
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Complete a frase: Compreender a importância dos _______ em setores de alta tecnologia.
metais pesados
lantanídeos
gases nobres
halogênios
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Os lantanídeos são conhecidos por suas propriedades ________ e físicas.
Químicas
Biológicas
Atômicas
Magnéticas
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Complete: Os lantanídeos foram inicialmente denominados como ___.
metais pesados
terras-raras
gases nobres
halogênios
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Complete: A abundância dos lantanídeos na litosfera é relativamente ___.
baixa
alta
média
inexistente
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual elemento tem o símbolo Pr?
Praseodímio
Neodímio
Promécio
Samário
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Para que é utilizado o cério na indústria?
Produção de baterias
Vidros e catalisadores
Fabricação de plásticos
Produção de aço
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Qual das seguintes opções NÃO é uma aplicação dos lantanídeos?
Supercondutores
Fibras ópticas
Computadores
Agricultura
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