Question

elements and compounds notes
counting elements in a molecule:

• count the number of elements symbols. a compound will always have at least two elements.
• every elements symbol has one
• how many elements are in the compound: na₂o?

Explanation:

• In chemistry, when counting elements in a molecule, we look at the element symbols. A compound is a substance formed when two or more elements chemically bond together, so it has at least two elements. Each element symbol starts with a capital letter. For \(Na_2O\), \(Na\) (sodium) and \(O\) (oxygen) are the two elements.

Answer:

• Count the number of element symbols. A compound will always have at least two elements.
• Every element's symbol has one capital letter.
• How many elements are in the compound: \(Na_2O\)? Two (sodium and oxygen)