Molecules
A molecule is a group of two or more atoms that are chemically bonded together. These atoms can be of the same element or different elements.
Structure of Molecules
Molecules are composed of atoms that are held together by chemical bonds. The arrangement of atoms in a molecule is known as its molecular structure.
Types of Molecules
There are two main types of molecules:
- Diatomic Molecules: These are molecules composed of two atoms of the same element bonded together. Examples include oxygen (O2) and hydrogen (H2).
- Compound Molecules: These are molecules composed of atoms of different elements bonded together. Examples include water (H2O) and carbon dioxide (CO2).
Properties of Molecules
Molecules have various properties, including:
- Mass: The total mass of a molecule is the sum of the masses of its constituent atoms.
- Shape: The arrangement of atoms in a molecule determines its shape, which can affect its properties and interactions.
- Polarity: Some molecules have polar bonds, meaning one end of the molecule has a slight positive charge while the other end has a slight negative charge.
Chemical Reactions
During chemical reactions, molecules can break apart (decomposition) or combine with other atoms to form new molecules (synthesis).
Importance of Molecules
Molecules are essential to life and play a crucial role in various biological, chemical, and physical processes. Understanding molecules helps in fields such as medicine, environmental science, and materials science.
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Activity LessonWorksheet/Answer keyWorksheet/Answer keyWorksheet/Answer keyVocabulary/Answer keyVocabulary/Answer keyThe resources above cover the following skills:
Life Science
Interdependence - A. Plants and animals, including humans, interact with and depend upon each other and their environment to satisfy their basic needs. B. Both human activities and natural events can have major impacts on the environment. C. Energy flows from the sun through producers to consumers.
Compare and contrast adaptations displayed by animals and plants that enable them to survive in different environments such as life cycles variations, animal behaviors and physical characteristics.