Atomic Structure Flashcards
ATOMIC STRUCTURE
Atom define as
Atom
the smallest cells of matter of an element
Atom
made of subatomic particles
3 Subatomic particles
P.E.N
protons, electrons, neutrons
ATOM
have a positive charge, found in nucleas
protons
P = positive = protons (P)
ATOM
have a no charge, found in nucleas
neutrons
No charge = Neutrons (N)
ATOM
have negative charge, move in the space around nucleas
electrons
negative = e-
half equations chap 1 form 5
Atomic Symbol
Atomic Number
TOP OF THE CHEMICAL SYMBOL
No of protons in nucleas
Atomic Symbol
Atomic Mass
UNDER CHEMICAL SYMBOL
No of protons and neutrons in nucleas
Atom
Number of electrons same with
number of protons
Atom
Nucleon number
P + N
Number of protons + Number of neutrons
ATOM
Neutron atom
No. of protons = No. of electrons
ATOM
Positive Ion
No. of protons > No. of electrons
ATOM
Negative Ion
No. of electrons < No. of protons
Relative Atomic Mass
RAM definate as
mass of an atom of the element compared to 1/12 of the mass of a carbon-12 atom
expressed in atomic mass unit (amu)
Relative Molecular Mass
RMM definate as
mass of a molecule of the element or compound compared to 1/12 to the mass of a carbon-12 atom
expressed in atomic mass unit (amu)
Mole
Mole define as
amount of substance that contains as many elementary entitles as there are atoms in 12 grams of carbon-12
Chemical Formula
define as
expression of the types and numbers of atoms in a chemical compound
example : Ar, H2O, MH3
Chemical Formula
Molecular define as
shows the actual number of atoms of each element present on one molecule of the compound
example = C2H4
Chemical Formula
Empirical define as
shows the simplest whole number ratle of atoms of each element present to the compound
example = CH2
