Simple Molecules and Extended Structures

• A chemical formula that shows atomic composition

• A chemical equation that shows a reaction

• A chemical symbol for the periodic table

• A chemical number that shows the atomic mass

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What is the chemical formula for caffeine (pictured)?

• C₄H₂N₁₀O₈

• CHN₂O

• CHNO

• C₈H₁₀N₄O₂

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What is the example in the image?

• The electrons in an atom

• A diatomic structure

• An extended structure (crystal lattice)

• A water molecule

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What is the difference between a molecule and a compound?

• One is radioactive.

• Molecules are made of the same atoms, while compounds are made up of two or more different types of atoms.

• They are both made of only a single atom.

• One makes you up and the other makes the thing that make you up.

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Why are oxygen molecules (O₂) different than ozone molecules (O₃) even though they are made up of the same atoms.

• They have different structures.

• They have different amounts of atoms.

• They have different chemical formulas.

• All of the above answers are correct.

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How can you use the Periodic Table of Elements to determine single elements from compounds?

• Look at the atomic numbers on the Periodic Table of Elements.

• Look at the atomic mass.

• Use the elements abbreviations to see if more than one element is represented in a compounds name. A compound has two or more different elements.

• Look for chemical blocks.

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Molecules are atoms "joined" together by...

• chemical bonds/attractive forces.

• sticks/circles/spheres.

• super glue!

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This is an example of a(n)...

• simple molecule.

• extended structure.

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This is an example of a(n)...

• simple molecule.

• extended structure.

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What is an extended structure?

• A type of extended structure that is made of many smaller, atoms in a chain.

• The types of elements that make up a substance, as well as the specific ratios of atoms of each kind of element that make it.

• A structure whose subunits occur in a constant ratio and are arranged in a repeating pattern; the subunit can be individual atoms (like Carbon) or a molecule (like propane or butane).

• A group of two or more atoms that are held together by chemical bonds.

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