Chemistry Oct. 25-Nov. 1, 2017

•OBJECTIVE: Students will

 describe orally and in writing 

how the atoms of one element are

 similar and how atoms of

 another element are different.

•WARM-UP

•1. An atom has 25 protons and

20 neutrons. What is the atomic

number, mass number, & name 

for this element?

•2.What is the atomic number,

 mass number, #protons,

 electrons, & neutrons for the

 element Bromine-82?

CW

•Notes on

•atomic mass calculations

•Isotopes

•Open book assignment-Page 122

 #47-52, 55, 57, 64, & 65