Mole Concept Flashcards
Definition of Atom
The smallest indivisible part of the element
Charge and Mass of Subatomic particles
Proton: Mass is 1 Charge is +1
Electron: Mass is 1/1810 approximately 0 and Charge
is -1
Neutron Mass is 1 Charge is 0
Proton Number Definition
The total number of protons in an atom
Nucleon Number Definition
The total number of protons and neutrons in an atom
Ion definition
A particle with an unequal number of protons and electrons
Isotopes definition
Isotopes are atoms of the same element having the same number of protons but different number of neutrons
Do isotopes of the same elements have the same chemical properties?
Yes because they have the same number of electrons
Definition of molecule
A molecule is a group of atoms covalently bonded together in an element or compound.
Definition of relative isotopic mass
Mass of one atom of the isotope compared to 1/12 the mass of one atom of Carbon 12
Definition of relative atomic mass
The average mass of one atom of the element as compared to 1/12 of the mass of one atom of Carbon-12
The formula for relative atomic mass
Σ( relative abundance x relative isotopic mass) / relative abundance
Relative molecular mass, Ar
The average mass of one molecule as compared to 1/12 the mass of one atom of Carbon 12
Relative formula mass, Mr
The average mass of one formula unit of the substance as compared to 1/12 of the mass of one atom of Carbon 12.
Express Avogadro’s constant in mole
One mole contains exactly 6.02x 10^23 mol
How to find no. of moles given number of particles
Number of particles/(6.02 x 10^23)
