
valențele elementelor chimice
Authored by Tcacenco Aliona
Chemistry
10th Grade
Used 7+ times

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11 questions
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1.
MULTIPLE SELECT QUESTION
20 sec • 2 pts
valența
se notează cu cifre romane deasupra elementului chimic
se notează cu cifre arabe deasupra elementului chimic
este capacitatea atomilor unui element de a se combina cu un nr strict de atomi ai altui element
este notarea convențională a elementului chimic cu una sau două litere
2.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
valența superioară
este egală cu nr perioadei
este egală cu nr grupei
3.
MULTIPLE SELECT QUESTION
20 sec • 2 pts
valența inferioară
este specifică pentru metale
este specifică pentru nemetale
este egală cu nr. grupei
este egală cu 8-nr.grupei
4.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
elementul chimic OXIGEN are valența egală cu:
II
VI
5.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Hidrogenul are valență
constantă
variabilă
6.
MULTIPLE SELECT QUESTION
20 sec • 4 pts
clorul are valența
I
III
V
VII
7.
MULTIPLE CHOICE QUESTION
20 sec • 1 pt
Elementul cu nr atomic 6 poate avea valențe:
impare
pare
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