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WorksheetsAtoms & Molecules
Total questions: 25
Worksheet time: 22mins
The smallest particle of a substance is......
atom
element
molecule
compound
Atomicity is ......
the number of atoms present in an element.
the number of atoms present in a molecule.
atomic mass
none of the above
Atomicity is ......
the number of atoms present in an element.
the number of atoms present in a molecule.
atomic mass
none of the above
The short-hand notation of an element is called....
formula
symbol
mark
representation
The bonding capacity of an element is called......
Atomic number
Atomic Mass Unit
Molecular mass
Valency
"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
"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 constant proportion?
John Dalton
Joseph L Proust
Lavoisier
Neil's Bohr
The Latin name of water is.....
Oxy
Hello
Hydro
none of the above
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
The symbol of Gold is......
G
Ag
Au
Go
The Latin name of Potassium is......
Natrium
Kalium
Plum bum
None of the above
Hydragyrum is the Latin name of ......
Iron
Mercury
Tin
Tungsten
Valency of Hydrogen is......
1
2
3
4
Which of the following is a chemical symbol?
H2O
O
NaCl
FeO
Al2(SO4)3
Which image is the best model of a diatomic molecule?
All of these are images of molecules except which one?
Study this model of a compound molecule. If the molecule is NaCO3,which color bead must represent oxygen?
black
white
red
not enough information
If a formula has 2 DIFFERENT capital letters in it, it means all of the following except what?
It is a compound.
It is a molecule.
It has different type of atoms in it.
It is a diatomic molecule.
What could be the formula of this molecule model?
O2
CO2
CaCO3
Kr
