2/10/10
Post date: Feb 10, 2010 4:25:20 PM
Bell Activity: Why do people form connections with other people?
Why chemical bonds form
Each atom wants to have a stable number of electrons
More atom anatomy
Charges
Atoms are made of protons, neutrons, and electrons
Protons have positive charge, electrons have a negative charge, neutrons have no charge
When not bonded, atoms have the same number of protons and electrons, so net charge is 0
Electrons
Arranged in different levels or orbitals, with each level being able to hold a certain number of electrons
Valance electrons - the electrons in the outer-most level, involved in chemical bonding
Periodic table shows us how many valence electrons different atoms have by which column the element is in
Atoms want to have their outermost electron level filled up completely, and can do this in 2 ways
Take more electrons from another atom or give up electrons to another atom
When an atom gains electrons or gives them up, it is called an ion
Share electrons with another atom
These two methods result in 2 different types of bonds