atomic structure student version
DESCRIPTION
Atomic structure by Mr Law Hock LingTRANSCRIPT
Edufest 2013
CHEMISTRY – AN ESSENTIAL SCIENCE
Topic Date
Kinetic Particle Theory Jan
Experimental Techniques Jan-Feb
Elements, Compounds and Mixtures
Feb
Atomic Structure Feb-Mar
Chemical Bonding Mar-Apr
Chemical Equations Apr
Acids, Bases and Salts Apr-May
Chemical Calculations Jun-Jul
The Atmosphere and Environment
Jul-Aug
Revision Sep-Oct
Sec 3 Chemistry Timeline
Atomic Structure
It Boils Down To Atoms!
Subatomic Particles
care
The Model of an Atom•One negative charge (1-)•Negligible mass (1/1836)
•One positive charge (1+)•Relative mass of 1
•No electric charge•Relative mass of 1
Bohr Model of an Atom
Electron arrangement in an Atom
Rules for Drawing Electronic Structures
• An electron occupies the ___________before pairing up with another.
• __________energy shells are occupied first.• First shell, max = ___ electrons• Second shell, max = ___ electrons• Third shell, max = ___ electrons• Fourth shell, max = ___ electrons
Electronic Structure of a Magnesium atom
Representing the Proton and Mass Numbers
Neutral Atom : No of protons = No of electrons
Skills Practice 1
Drawing Electronic Structures
Could you spot some patterns?
What is the relationship between these three atoms?
ISOTOPES! ATOMS OF THE SAME ELEMENT WITH THE SAME NUMBER OF PROTONS AND ELECTRONS, BUT DIFFERENT NUMBER OF NEUTRONS.
Skills Practice 2
T/F
Skills Practice 3