7.1. Introduction to Chemical Bonds http://www.ck12.org
Lesson Summary
- A chemical bond is a force of attraction between atoms. It occurs when atoms share or transfer electrons.
- A chemical compound is a new substance that forms when atoms of different elements form chemical bonds.
A compound always consists of a fixed ratio of elements.
Lesson Review Questions
Recall
- What is a chemical bond?
- Define chemical compound.
Apply Concepts
- Which atoms and how many of each make up a molecule of sulfur dioxide? Write the chemical formula for
this compound.
Think Critically
- Why does a molecule of water have a more stable arrangement of electrons than do individual hydrogen and
oxygen atoms? - Explain how the ratio of elements in a compound is related to the compound’s properties.
Points to Consider
In this lesson, you learned about chemical bonds in a water molecule. The bonds form between atoms of hydrogen
and oxygen when they share electrons. This type of bond is an example of a covalent bond.
- What might be other ways that atoms can bond together?
- How might ions form bonds?