EasyChemistryHigh School (9–10)GeneralAtoms and Molecules › Molecules, Ions and FormulaeConceptualBoard Exam
Give the atomicity of each, and say whether it is monatomic, diatomic, triatomic or has more atoms…
Contributed by StemPy LabTry it on paper first. A hint, the key idea and the worked solution are here when you need them.
Give the atomicity of each, and say whether it is monatomic, diatomic, triatomic or has more atoms.
- Argon,
- Chlorine,
- Carbon dioxide,
- White phosphorus,
- Ethane,
Need a reminder? The key ideaShow
A molecule is a group of atoms joined together. Its atomicity is the number of atoms in it. A small number after a symbol counts atoms in one molecule; a number in front counts molecules; a number after a bracket multiplies everything inside.
The worked solution
Have you tried it?
Work it out on paper first. It is fine to get stuck or make a mistake: that is how we learn. When you are ready, go through the solution one step at a time, and check each step against your own.
Step 1. (a) Argon: , monatomic. (b) Chlorine: , diatomic. (c) Carbon dioxide: , triatomic.
Step 2. (d) White phosphorus: . (e) Ethane: .
Answer: , , , and .
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