Chemistry Oct. 15 & 19, 2015

•OBJECTIVE: Students will discuss and write answers to several questions on the development of the model of the atom.

•W.O.D. saccharine-overly sweet

•WARM-UP

1. Define the following terms: Atomic number, mass number, isotopes, atomic mass

CW

Notes-practice

The nuclear atom

A. Complete table on the board
B. Complete questions on the screen

1.An atom has 4 protons and 5 neutrons in its nucleus. What is the atomic number? What is the mass number? Name of the element?

2.An element’s atomic number is 30 and mass number 62. How many protons, neutrons, electrons, name of element.

3.For the isotope nitrogen-15. what is atomic number, mass number, # protons, # neutrons, #electrons

4.12Mg