V. Answer the questions.
Example: What conditions must be satisfied for a positive ion to be formed?
For a positive ion to be formed one or several electrons must become excited and leave the atom.
1. What condition must be satisfied for a molecule to become decomposed?
2. … for two particles to be attracted to each other?
3. … for atoms to form a molecule?
4. … for a thermonuclear reaction to occur?
5. … for atoms to become excited?
6. … for a compound to be a good semiconductor?
7. … for a material to be an insulator?
8. … for a chemical reaction to go faster?
9. … for a reaction to slow down?
10. … for a substance to become chemically pure?
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