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WorksheetsAtoms and Molecules
Total questions: 20
Worksheet time: 10mins
Which correctly describes the smallest amount of an element?
Atom
Molecule
Compound
Proton
How would H2O be classified? Check all that apply.
Atom
Molecule
Compound
How would O2 be qualified. Check all answers that apply.
Atom
Molecule
Compound
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.
What is an element?
A pure substance that cannot be broken down.
Two atoms bonded together.
Two or more different types of atoms bonded together.
An molecule with an unequal distribution of charge.
How many H atoms are in H2O?
1
2
The short-hand notation of an element is called....
formula
symbol
mark
representation
"Total mass of the products formed in chemical reaction is exactly equal to the total mass of the reactants present in it." is a .....
Law of constant proportion
Law of multiple proportion
Law of conservation of mass
All the above
Father of modern chemistry is......
Antoine Lavoisier
Joseph L Proust
John Dalton
Rutherford
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
An Indian sage who postulated the atom in his VISHESIKA SUTRA was ... ...
Maharishi Kannada
Maharishi Kasyapa
Maharishi Kannada and Kasyapa are same.
None of the above
All matter is made of what
energy
atoms
electrons
compounds
What is a molecule?
two elements bonded together (sharing electrons)
a mixture of different substances
smallest individual particles
salt mixed in water
What is a compound?
Two different elements bonded together.
Two of the same elements bonded together.
A mixture of different substances.
Two substances stuck together with glue.
The final substances in a chemical reaction are called
products
reactants
