Atomic Structure Mind Map

Atomic-Structure-Mind-Map
Isotopes
- Atoms of same element
- Same atomic number
- Therefore they share the smae
chemical properties
- Due to same electonic
configuration of both isotopes
- Different mass numbers
(number of neutrons different)
- Different physical properties
(Density, melting point and boiling
point)
Electronic Configuration
- Electrons arranged around the
nucles in the shells of an atom
- Shells number 1,2,3 and so on
- Each shell can occupy a
certain number of electrons
- Finding electron configuration
- Find the proton number of the atom
- Find out the numbers of electrons from
there. (number of protons = number of
electrons)
- Arrange the electrons in shells. Electrons
occupy the shell closest to the nucleus
first
- Electrons only start occupying a new
shell when the previous one has been
occupied
- Valence Electrons
- Electrons found in the
outermost occupied shell of an
atom
- Outermost shell refers to the
shell which is furthest from the
nucleus
- Nature of elements can be
determined by the number of
valence elctrons
- 1-2 are metallic. The
exception being aluminium
with 3
- 4-8 are generally non-metallic
elements
One Atom Consist of..
- Electron
- Hold a negative charge
- mass of 1/1836
- 1/2000 the mass of a proton
- Number of electron and
neutron = mass number
- Neutron
- No charge
- mass of 1
- Proton
- Holds a positive charge
- mass of 1
- Number of protons = atomic number
Gains or loses Electrons
- Ions
- Gain electrons
- Usually non-metals
- Anions
- Ions are negatively charged
- Lose electron
- Cations
- Usually a metal
- Ions are positively charged
Combines Chemically
- Molecules
- Molecules of compounds
- Consists of atoms of different
elements
- Examples
- Hydrochloric Acid
- Methane
- Ammonia
- Carbon dioxide
- Water
- Molecules of elements
- Consists of atoms of the
same element
- Examples
- Nitrogen
- Hydrogen
- Oxygen
- Chlorine
- Phosphorus
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