Zusammenfassung der Ressource
Basis Of Atoms
- Atoms contain Protons, Neutrons and Electrons
- The Nucleus is the middle
- Made of Protons and Neutrons
- Positive Charge
- Always the same
number of Protons
and Electrons
- Electrons
move around
in electron
shells
- Negatively
charged and no
mass
- Neutrons have no charge, so Atom
has no overall charge
- Atomic Number = Bottom Number
- Number of Protons
- Therefore the number
of Electrons
- Mass Number = Top Number
- Total number of Protons AND Neutrons
- No of Neutrons = Mass number - Atomic Number
- Elements are atoms with
the same Atomic Number
- Protons decide what type of Atom it is
- All of the same element have the same No. of Protons
- Can have a different No. of Neutrons
and Electrons
- 100 different elements
- Represented on the
Periodic Table
- Isotopes have a different number of Neutrons
- Same Atomic No. but different Mass No.
- Relative atomic mass is used instead
- taking in all the masses of
isotopes that make up an
element
- Relative atomic mass = Sum of
(isotope abundance x isotope
mass number) / sum of
abundance of all the isotopes
- Abundance means amount
- Will be told the abundance in the Question
- Atoms join together to make Compounds
- Taking, giving away or sharing of electrons
- Metals and Non-metal compounds consist of Ions
- Non-Metals consist of Molecules
- Covalent Bonding
- Ionic Bonding