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