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