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