Химична символика
Quiz
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Chemistry
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Professional Development
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Medium

erina Chamowa
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6 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Какво означава 3H
3 атома хлор
3 молекули водород
3 атома водород
една молекула трихидрид
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Химични уравнения се изравняват чрез
коефициенти
индекси
коефициент и индекс
валентност
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Как се означават пет молекули кислород
5O
5O²
O₅
5O₂
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Химичната формула НЕ показва
Качествения състав на веществата
Броя атоми за всеки химичен елемент
валентността
количествения състав
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
В кой от редовете са записани означения само на химични елементи
Fe, H,3Mg, H₂,Cl
Cl, 2O, K, 2H, Ca
Na, 3S, Ca, O₂, H
Ca, O₃, S, K, H₂
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Кое от записаните по долу уравнения не е изравнено
H₂ ₊ Cl₂ → 2HCl
Ca + O₂→CaO
4P + 5O₂→2P₂O₅
2HgO →2Hg +O₂
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