Download Structure of the atom

Structure of the atom
What makes up the atom?
• Nucleus
– Protons (positively
charged)
– Neutrons (no overall
charge)
• Orbitals
– Electrons (negatively
charged)
– Outermost orbital is called
the valance shell.
– Electrons in valance shell
are called valance
electrons.
– Fill starting with the
innermost orbital
What is the Planetary
Model of the atom?
What is the Rutherford
Nucleus Model of the
atom?
What is the Electron Cloud
Model of the atom?
How to read the periodic
table?
Name of Element
Potassium
K
19
Atomic Number
Atomic Symbol
39.0983
Atomic Mass/ Weight
(Mass Number)
How to calculate what
makes up an atom?
Answers:
Atomic Mass = 39
Potassium
Atomic Number = 19
Protons = 19
19
K
Electrons = 19
Neutrons = 20
39.0983
Atomic Number
Atomic Mass/ Weight
(Round to the nearest
whole number when
using in calculations)
How to calculate Protons, Neutrons, and Electrons:
# Protons = Atomic Number
# Electrons = # Protons in a neutral atom
# Neutrons = Atomic Mass (rounded) – Atomic Number
You try Potassium…….
What is element notation?
X represents the atom's elemental symbol.
A represents the atomic mass
Z represents the atomic number
Set up the element notation for Potassium
(K)
Let’s do an example
Element = Carbon
Atomic mass = 12
Atomic number = 6
Protons = ?
Neutrons = ?
Electrons = ?
Element = Carbon
Atomic mass = 12
Atomic number = 6
Protons = 6
Neutrons = 6
Electrons = 6