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Chapter 3.3 - Representing Compounds
Principles of Chemistry - A Molecular Approach, 2nd Edition by Nivaldo J. Tro
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Chemistry
Undergraduate 1
12/08/2012

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Term
What is a chemical formula?
Definition
A chemical formula indicates the elements present and the number of atoms in each.
Term
What is an empirical formula?
Definition
An empirical formula only gives the relative number of atoms present in the molecule
Term
What is a molecular formula?
Definition
A molecular formula gives the actual number of atoms present in the molecule
Term
What is a structural formula?
Definition
Uses lines to represent the covalent bonds, shows how atoms in a molecule are connected or bonded to each other.
Term
What is a ball-and-stick model?
Definition
Represent atoms as balls and chemical bonds as sticks
Term
What is a space-filling molecular model?
Definition
Atoms fill the space betwen each other to more closely represent our best estimates for how a molecule might appear is scaled to a visible size
Term
What are molecular elements?
Definition
Occur as molecules (mostly diatomic).
Term
What are atomic elements?
Definition
Occur as individual atoms
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