🧪 M.C.Q.: Choose the correct answer(s) ✅
🇫🇷 French Version
1.
A molecule is:
made up of a set of bonded atoms ⚛️
associated with a formula 🧾
invisible because it is extremely small 🔎
2.
The symbol of an atom contains:
always two letters
at least one uppercase letter 🔠
often a second lowercase letter
3.
The ethanol molecule C
2
H
5
OH contains:
three types of atoms 🧬
6 hydrogen atoms
two carbon molecules
4.
A water molecule contains one oxygen atom and two hydrogen atoms, so its formula is:
2HO
O
2
H
H
2
O
H
2
O
5.
The carbon monoxide molecule contains:
one oxide atom and one carbon atom
two oxygen atoms and one carbon atom
one oxygen atom and one carbon atom
6.
2 CO
2
+ H
2
O represents:
two carbon dioxide molecules and one water molecule 💧
one carbon dioxide molecule and two water molecules
one carbon dioxide atom and two water atoms
📊 RESULT:
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