Smallest particle of an element or a compound that is capable of an independent existence and shows all the properties of that substance is
A molecule
An atom
Complex
Mixture
Formula of calcium oxide is
CaO
CaO2
Ca2O
Ca2O3
The ratio of given number of particles to Avogadro number gives
Number of moles
Atomic number
Molecular mass
Atomic mass
Atoms of same element or of different elements can join together to form
Molecules
Ions
Colloids
Complexes
In a chemical substance, the elements are always present in definite proportions by mass.The law is
Law of constant proportion
Law of conservation of mass
Avogadro'slaw
Boyle's law
The number of atoms constituting a molecule is known as its
Atomicity
Isotopic mass
Mass can neither be created nor destroyed in a chemical reaction.This is
Avogadro's law
The mass of 0.5 mole of N2 gas is
7g
14g
21g
28g
The symbol of Potassium is
P
Ka
Pa
K