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WorksheetsGrade 9 Atoms & molecules 1
Total questions: 11
Worksheet time: 6mins
Which correctly describes the smallest amount of an element?
Atom
Molecule
Compound
Proton
What does conservation of matter mean?
Matter cycles through an ecosystem and 10% is lost as you move through each trophic level.
Matter cannot be created, but can be destroyed.
Matter cannot be created nor destroyed, and cycles through ecosystems.
Matter and energy both move through ecosystems with 100% efficiency.
The smallest particle of a substance is......
atom
element
molecule
compound
The short-hand notation of an element is called....
formula
symbol
mark
representation
"In a compound, the elements always present in the fixed ratio of their mass." is a ....
Law of constant proportion
Law of conservation of mass
Law of multiple proportion
None of the above
Who proposed Law of Conservation of mass?
Proust
Dalton
Democrats
Lavoisier
Who proposed Law of constant proportion?
John Dalton
Joseph L Proust
Lavoisier
Neil's Bohr
'S' is the symbol of ....
Silicon
Sulfur
Sodium
Above all
The symbol of Gold is......
G
Ag
Au
Go
The Latin name of Potassium is......
Natrium
Kalium
Plum bum
None of the above
