1. Name:__________
Date:_________
Please use the following slides to complete the attached atomic basics worksheet. You may work with one neighbor.
Atomic Basics

2. Atomic number- # of protons and electrons Atomic Symbol
Elements are distinguished on the periodic table by the number of protons in their nucleus.
Atomic number- # of protons and electrons
Atomic Symbol
Atomic Mass= # protons + # neutrons
Atomic Number
Atomic Symbol
Atomic Mass

3. It determines the bonding properties
Valance numbers are the number of electrons in the last shell or energy level. It can be determined by looking at which group the element is in.
It determines the bonding properties
of the atom.
What is the significance of the valance number? -