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What does John Dalton’s atomic theory propose?
Matter is made of light.
Matter is made of energy.
Matter is made of molecules.
Matter is made of tiny pieces called atoms.
How many different types of atoms are currently known?
118
100
150
50
What does the chemical formula C6H12O2 represent?
Carbon dioxide
Water
Isovaleric acid
Ethyl butyrate
Why does ethyl butyrate smell pleasant like oranges?
It has the same atomic structure as oxygen.
It is a processed compound made in a lab.
It is found naturally in many fruits.
It is made of carbon and hydrogen atoms.
What makes Isovaleric acid smell unpleasant?
It is colorless.
It has a slightly different atomic structure than ethyl buty
It is made of sulfur atoms.
It is a solid at room temperature.
What are diamonds made of?
Zirconium and oxygen atoms
Carbon atoms
Hydrogen and oxygen atoms
Nitrogen atoms
What is cubic zirconia made of?
Groups of zirconium and oxygen atoms
Molecules of gold
Pure carbon
Carbon and hydrogen atoms
Why are diamonds harder than cubic zirconia?
Cubic zirconia is a liquid at high temperatures.
Cubic zirconia contains impurities.
Diamonds are heavier.
Diamonds are made of pure carbon atoms packed tightly.
What is the difference between molecules and extended structures?
Molecules are always solid; extended structures are liquid.
Molecules contain more oxygen than extended structures.
Molecules are separate units; extended structures are interc
Molecules are larger than extended structures.
Which substance is an example of an extended structure?
Water
Diamond
Ethyl butyrate
Air
How do chemists determine if a gemstone is a real diamond?
By testing if it can dissolve in water.
By looking for the presence of carbon atoms.
By checking if it contains zirconium.
By examining its price.
What makes substances have different properties?
Their shape and size.
The number and type of atoms that repeat in their structure.
Their atomic weight.
The temperature at which they are found.
