Selectează caracteristicile elementului chimic oxigen.
Oxigenul - element chimic și substanță simplă.

Quiz
•
Chemistry
•
8th Grade
•
Hard
Stela Burcovschi
Used 11+ times
FREE Resource
5 questions
Show all answers
1.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Conține 8 protoni.
Are masa atomică relativă egală cu 16.
Are masa atomică relativă egală cu 32.
Are valența II.
2.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Selectează caracteristicile substanței cu denumirea oxigen.
Este o substanță simplă nemetalică.
Atomii sunt uniți prin legătură covalentă nepolară.
Are 6 electroni de valență.
Are masa molară 32 g/mol.
3.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Selectează substanțele ce conțin oxigen.
Apă.
Acid sulfuric.
Sare de bucătărie.
Hidroxid de calciu.
4.
MULTIPLE SELECT QUESTION
30 sec • 1 pt
Oxigenul este răspândit în natură sub formă de ....
substanță simplă - oxigen.
substanțe compuse: apă, compuși organici, oxizi etc.
element chimic.
5.
MULTIPLE SELECT QUESTION
45 sec • 1 pt
Selectează proprietățile fizice ale oxigenului.
Gaz, incolor, inodor, insipid.
Insolubil în apă.
Puțin solubil în apă.
Conduce bine căldura și curentul electric.
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