3 Questions
What is a molecule?
The smallest unit of a substance
What holds atoms together in a molecule?
Electrons
What are homonuclear diatomic molecules?
Molecules with identical atoms
Study Notes
- A molecule is a group of two or more atoms that form the smallest identifiable unit of a pure substance.
- The composition and chemical properties of a substance are retained in a molecule.
- Further subdivision of a substance leads to smaller parts that differ in composition and chemical properties.
- Chemical bonds hold atoms together in a molecule.
- Molecules consist of an aggregation of atoms held together by valence forces.
- Diatomic molecules contain two chemically bonded atoms.
- Homonuclear diatomic molecules have identical atoms, while heteronuclear diatomic molecules have different atoms.
- Molecules with more than two atoms are called polyatomic molecules.
- Polymer molecules may contain many thousands of component atoms.
- Atoms consist of a single nucleus with a positive charge surrounded by a cloud of negatively charged electrons.
Take this quiz to test your knowledge on the basics of molecules and atoms. Learn about chemical bonds, diatomic and polyatomic molecules, and the composition and properties of substances. See if you can identify the differences between homonuclear and heteronuclear diatomic molecules and understand the concept of polymer molecules. Brush up on your chemistry knowledge and challenge yourself with this informative quiz.
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