
Importanța ionilor Metalici pentru organismele vii. Toxicitatea
Quiz
•
Chemistry
•
9th Grade
•
Practice Problem
•
Hard
Mihai-Andrei Ursache
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22 questions
Show all answers
1.
MULTIPLE SELECT QUESTION
30 sec • 5 pts
Care dintre următorii ioni au sarcină pozitivă?
Cl⁻
K⁺
NO₃⁻
Ca²⁺
2.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Ce rol are sodiul în corp?
Menține echilibrul apei între celule
Formează oasele
Produce energie
Controlează temperatura
3.
MULTIPLE SELECT QUESTION
30 sec • 5 pts
Care dintre acești ioni sunt anioni (sarcină negativă)?
PO₄³⁻
Mg²⁺
Cl⁻
Na⁺
4.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Un ion este...
Un atom care a pierdut sau câștigat electroni
Un atom fără protoni
Un electron liber
O moleculă neutră
5.
MULTIPLE SELECT QUESTION
30 sec • 5 pts
Exemple de ioni poliatomici sunt:
NH₄⁺
SO₄²⁻
K⁺
Ca²⁺
6.
MULTIPLE SELECT QUESTION
30 sec • 5 pts
Ce proprietăți caracterizează compușii ionici?
Topire la temperaturi joase
Conduc curent electric în stare lichidă sau soluție
Sunt flexibili
Au puncte de topire ridicate
7.
MULTIPLE CHOICE QUESTION
30 sec • 5 pts
Care dintre metale este esențial pentru oase și dinți?
Calciu
Zinc
Crom
Sodi u
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