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Is NaCl an element or a compound?
False
oxygen and hydrogen
iron
element
sometimes one, sometimes two
true
True
compound
One difference between elements and compounds is that there are an infinite number of elements, but only a limited number of compounds.
False
oxygen and hydrogen
iron
element
sometimes one, sometimes two
true
True
compound
What type of substance is Au (gold)
False
oxygen and hydrogen
iron
element
sometimes one, sometimes two
true
True
compound
Elements are represented by chemical symbols. How many letters are in the chemical symbols of elements?
False
oxygen and hydrogen
iron
element
sometimes one, sometimes two
true
True
compound
Elements are made up of a uniform composition
False
oxygen and hydrogen
iron
element
sometimes one, sometimes two
true
True
compound
Which two elements make up the majority of all oceans on Earth?
False
oxygen and hydrogen
iron
element
sometimes one, sometimes two
true
True
compound
One difference between elements and compounds is that an element consists of only one type of matter, while a compound consists of two or more types.
False
oxygen and hydrogen
iron
element
sometimes one, sometimes two
true
True
compound
Which one of these elements is NOT one of the three most abundant elements in plants and animals?
False
oxygen and hydrogen
iron
element
sometimes one, sometimes two
true
True
compound
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