Chemistry Oct. 10 & 13, 2014

•OBJECTIVE: Students will learn to describe in writing the contents of the nuclei of several atoms by calculating the atomic numbers and mass numbers.

•W.O.D. Harrowing-agonizing, distressing

•WARM-UP

1.Define atomic number and mass number.

2.An atom has 6 protons and 7 neutrons. What is the atomic and mass number for this atom?

Classwork

1.Complete table (include # of neutrons)

2.Isotopes (2 methods)-draw diagrams

3.Atomic mass