structure of the atom 2
TRANSCRIPT
Structure of the Atom
The Atom The atom is the smallest part of any element that
retains all of the properties of that element. The atom is made up of:
protons (+)electrons (-)neutrons (0)
The central core of the atom is called the nucleus, containing protons and neutrons. (Nucleus charge = +)
The Atom
PROTONS
# protons = atomic #
The Atom
ELECTRONS
# electrons = # protons
The Atom
NEUTRONS
# neutrons = atomic mass -
atomic #
In your notebook, determine the number of protons, electrons, and neutrons for the following elements:
Oxygen Argon Magnesium Neon Nitrogen Chlorine
Protons Neutrons Electrons
8 8 8
18 22 18
12 12 12
10 10 10
7 7 7
17 18 17
The Atom
The electrons are located in energy levels around the nucleus.
Electron Fill Rule (2-8-8 rule) Electrons fill energy levels as follows
– First Energy Level = 2 electrons– Second Energy Level = 8 electrons– Third Energy Level = 8 electrons
Let’s Practice
Oxygen Argon Magnesium Neon Nitrogen Chlorine
http://www.chemicalelements.com/