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The majority of Earth's atmosphere is up of what percentage of what element?
two elements combined chemically to form a new compound.
a compound
78%nitrogen, 21% oxygen
metalloids and metals
nitrogen
both He and O2
copper
metal
An element + an element = ???
two elements combined chemically to form a new compound.
a compound
78%nitrogen, 21% oxygen
metalloids and metals
nitrogen
both He and O2
copper
metal
Which of the following is not one of the most abundant elements of solid Earth?
two elements combined chemically to form a new compound.
a compound
78%nitrogen, 21% oxygen
metalloids and metals
nitrogen
both He and O2
copper
metal
Which of the following are likely to have luster?
two elements combined chemically to form a new compound.
a compound
78%nitrogen, 21% oxygen
metalloids and metals
nitrogen
both He and O2
copper
metal
If an element conducts electricity, is a solid and is malleable and ductile. The element is a
two elements combined chemically to form a new compound.
a compound
78%nitrogen, 21% oxygen
metalloids and metals
nitrogen
both He and O2
copper
metal
Which of the following most likely conducts electricty?
two elements combined chemically to form a new compound.
a compound
78%nitrogen, 21% oxygen
metalloids and metals
nitrogen
both He and O2
copper
metal
Which of the following substances is an element?
two elements combined chemically to form a new compound.
a compound
78%nitrogen, 21% oxygen
metalloids and metals
nitrogen
both He and O2
copper
metal
When Hydrogen (H) combines with Clorine (Cl) to form HCl, what has happened?
two elements combined chemically to form a new compound.
a compound
78%nitrogen, 21% oxygen
metalloids and metals
nitrogen
both He and O2
copper
metal
Check it!