
Formule chimice
Authored by Nicoleta Maritanu
Chemistry
6th - 8th Grade
Used 5+ times

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10 questions
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1.
MULTIPLE CHOICE QUESTION
45 sec • 1 pt
O formulă chimică indică:
felul atomilor și numărul atomilor
forma și mărimea atomilor
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Pentru a scrie formule chimice trebuie să cunoști:
numărul de masă
masa atomică
valența elementelor
simbolurile chimice
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Valențele trecute pe diagonală devin...
coeficienți
indici
electroni
protoni
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
În formula generală MA (unde am notat cu M- metalul și cu A- nemetalul) metalul și nemetalul au valența egală?
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Într-o formulă chimică metalul se scrie...
după nemetale
depinde de metal
înaintea nemetalului
nu contează
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Dacă ai elementele SVI și OII formula obținută este...
S2O6
S6O2
SO2
SO3
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Combinațiile carbonului cu oxigenul sunt:
monoxidul de carbon (CO2) și dioxidul de carbon (CO)
CO, CO2, CO3
CO2 și CO3
monoxidul de carbon (CO) și dioxidul de carbon (CO2)
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