
MOLECULA
Interactive Video
•
Chemistry
•
7th Grade
•
Hard
Lenus Marcu
FREE Resource
4 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ce este o moleculă?
Când doi atomi se unesc.
O substanță simplă.
Un atom cu un singur electron.
O formă instabilă de oxigen.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Când se formează substanțe simple?
Când atomii sunt diferiți.
Când atomii sunt identici.
Când un atom are un singur electron.
Când se combină doi atomi de hidrogen.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ce indică numărul de la baza simbolului într-o moleculă?
Numărul de electroni de pe ultimul strat.
Numărul de protoni.
Numărul de atomi combinați.
Covalența elementului.
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Ce reprezintă covalența unui element într-o moleculă?
Numărul total de electroni ai atomului.
Numărul de electroni cu care participă fiecare element.
Numărul de straturi electronice.
Numărul de protoni din nucleu.
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