Which elements are colored red?
nonmetals
metals
metalloids
Elements in the shaded area can best be described as -
Malleable
Brittle
Dull
Insulators
Elements in the shaded area can best be described as -
Shiny and brittle
Insulators
Good conductors
The chemical equation shown below represents a reaction that produces fuel for certain cars.
CO + H2O------->CO2 + H2
Which substance in this equation is classified as an element?
CO
O2
CO2
H2
What tools would you need to find the density of an irregular shaped object?
graduated cylinder and triple beam balance
ruler and scale
graduated cylinder and ruler
triple beam balance and scale
Two elements that occur in the earth's atmosphere are _____ and _______.
Silicon and Argon
Argon and Aluminum
Nitrogen and Oxygen
Helium and Nitrogen
Which are the main elements that comprise Earth's living systems
carbon, hydrogen, nitrogen, oxygen,
oxygen, silver, gold
silicon, sodium, oxygen
nitrogen and oxygen
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