21 22Atomic Structure and Bohr Models

Starter

Application:

Atomic Math and Bohr Models

Sep 09, 2015 Sep 09, 2015

Exit: Explain how we determined the number of neutrons.

Practice:

Atomic Structure and Bohr Models

How do you find the identity and the mass of an element that has 20 protons, 20 neutrons, and 20 electrons?

Connection

1. What do you notice happens to the neutrons as the atoms gets larger?

2. What do you notice happens to the orbitals (levels) as the atom gets larger?

Which of the pictures above is the correct model for Carbon and why?

EQ: What is the Importance of Protons?

Agenda

• 1. Starter2. Practice

3. Atomic Math/Bohr Models 4. Exit

5. Homework Due 9/11

Date Lecture/ Activity/ Lab Page8/28 Syllabus /Notebook Guidelines 1-28/28 Periodic Table/ Formula 3-48/28 Tools/ Measurement 5-68/28 Lab Report/ Investigations 7-88/31 Atomic History 9-10 9/1 Atomic Structure 11-12 9/2 Atomic Charges 13-149/3 Ape Man 15-169/4 Electron Placement 17-189/8 Valence Electrons 19-209/9 Atomic Math 21-22

Table of Contents

Starter

Which of the pictures above is the correct model for Carbon and why?J because Carbon contains 6 Protons, 6 Electrons, and 6 Neutrons

Practice • How do you find the identity and the

mass of an element that has 20 protons, 20 neutrons, and 20 electrons?

To find the identity look at the number of protons. To find the mass, add the number to protons and neutrons together

Application: Atomic Structure And Bohr Models

Need the number of Protons or electrons? USE THE ATOMIC NUMBER

Need the number of Neutrons?

USE THE ATOMIC MASS AND SUBTRACT THE ATOMIC NUMBER

1H

1.008Hydrogen

Atomic Structure (example)

USE THE ATOMIC NUMBER

number of Protons 1

number of Electrons 1

USE THE ATOMIC MASS AND SUBTRACT THE ATOMIC NUMBER

1- 1= 0 Neutrons

number of Neutrons 0

1H

1.008Hydrogen

Atomic Structure Example

15.999

Substance Symbol Atomic Number

Mass Number

Number of Protons

Number of

Neutrons

Number of

Electrons

Helium He 2 4

Magnesium Mg 12 12

Zinc Zn 30 65

2He

4.0026Helium

2 2 2

24 12 12

30 35 30

Pick 5 Elements off Atomic Math paper and draw Bohr Models for them on a separate sheet of paper

Bohr Model Atomic # 7 THINK APE

A P E7 7 7

NEUTRONS

14 - 7 7

21 22Atomic Structure and Bohr Models

Starter

Application:

Atomic Math and Bohr Models

Sep 09, 2015 Sep 09, 2015

Exit: Explain how we determined the number of neutrons.

Practice:

Atomic Structure and Bohr Models

How do you find the identity and the mass of an element that has 20 protons, 20 neutrons, and 20 electrons?

Connection

1. What do you notice happens to the neutrons as the atoms gets larger?

2. What do you notice happens to the orbitals (levels) as the atom gets larger?

Which of the pictures above is the correct model for Carbon and why?

EQ: What is the Importance of Protons?