CP- L1.1 Modeling Atoms

CP- L1.1 Modeling Atoms

By : Ms. Bailey and Ms. Hall

​

Objective: KWBAT use Bohr diagrams to show and describe the structure of atoms.​

​TEKS: 8.5(A): describe the structure of atoms, including the masses, electrical charges, and locations, of protons and neutrons in the nucleus and electrons in the electron cloud

Lesson Vocabulary:

​

​Bohr model: shows the atom as a small, positively charged nucleus surrounded by orbiting electrons located in the electron cloud in shells or orbitals

Electron shell: Sometimes called ‘energy level’ or ‘orbital’is a region in the electron cloud that holds a specific number of electrons

Multiple Choice

what is the Bohr's model?

• a model of the atomic configuration of an atom

• a model of the proton

• a model of the neutron

• a model of the periodic table

Multiple Choice

what is an electron shell?

• the electron cloud or shell that holds a specific amount of electrons

• the proton cloud or shell that holds a specific amount of protons

• the neutron cloud or shell that holds a specific amount of neutrons

• the electron cloud or shell that holds a specific amount of electrons or protons

Some text here about topic of discussion

Welcome chemist, to a new mini-unit: Chemical Properties.  During our last unit you solved the mystery of a  reddish-brown substance coming out of Westfield’s tap water.  You learned a lot about atoms, chemical reactions, the conservation of matter and how new substances form. During this mini- unit you will use your knowledge about atoms to explore chemical properties of elements.

Multiple Choice

what are the main components of an atom?

• protons, nucleus and electrons

• protons, neutrons and energy levels

• protons, neutrons, electrons

Multiple Choice

what is the mass number of this atom?

• 6

• 8

• 10

• 12

​Bohr's Model

​Scientists have been studying the structure of the atom since ancient Greek time-- that’s about as yearly as the 5th century BCE!  Over time, many scientists have created different models to show the structure of the atom. One model used by scientists is called the Bohr model, which was created by Niels Bohr in 1913. While the Bohr model is not the current and most up-to-date model of the atom, it is useful in understanding the basic structure of atoms.  

You’ve already seen many Bohr models in previous lessons!  Today, you will use Bohr models to solidify your understanding of atomic structure.

Multiple Choice

what word goes in the box on the bottom left?

• electrons

• protons

• neutrons

• electron cloud

Multiple Choice

top right box....

• protons

• electrons

• neutrons

• electron cloud ( energy levels)

Multiple Choice

middle box...

• protons

• electrons

• neutrons

• energy cloud ( energy levels)

Multiple Choice

bottom right...

• protons

• electrons

• neutrons

• electron cloud ( energy levels)

Multiple Choice

what is the Bohr's model?

• a model of the atomic configuration of an atom

• a model of the proton

• a model of the neutron

• a model of the periodic table

Multiple Choice

what is an electron shell?

• the electron cloud or shell that holds a specific amount of electrons

• the proton cloud or shell that holds a specific amount of protons

• the neutron cloud or shell that holds a specific amount of neutrons

• the electron cloud or shell that holds a specific amount of electrons or protons

​Things to Remember....

​1. The period tells you the number of energy levels.... there is a maximum of seven energy levels.

​2. The group tells you how many valence electrons. Where are valence electrons located?

​3. The mass is the number of protons PLUS the number of neutrons.

​4. The atomic number is the number of protons.

​5. The majority of the mass of an atom is found in the nucleus.

​Lets Practice!

​1. Open your notebook to a new page

​2. Title: Bohr's Models with Ms. Bailey

​3. We are going to draw the following atoms:

​a. Magnesium

​b. sulfur

​c. Argon

​4. For each atom we need to draw:

​a. energy levels

​b. protons

​c. neutrons

​d. electrons

​Partner Practice....

​Now you and ONE other person ( or by yourself) will draw a Bohr's model of the following elements:

​a. Potassium

​b. krypton

​c. chlorine

​You will need to label:

​1. protons

​2. neutrons

​3. electrons

​4. energy levels

​15 minutes to complete!!!

​Exit Ticket Time!

​Think about what the question is asking you!

Multiple Choice

what is an electron shell?

• the electron cloud or shell that holds a specific amount of electrons

• the proton cloud or shell that holds a specific amount of protons

• the neutron cloud or shell that holds a specific amount of neutrons

• the electron cloud or shell that holds a specific amount of electrons or protons

Multiple Choice

The period tells you....

• the number of electrons

• the number of protons

• the number of orbital shells

• the number of valence electrons

Multiple Choice

The group tells you...

• the number of protons

• the number of valence electrons

• the number of valence electrons

• the mass number

Multiple Choice

Where are valence electrons located?

• on the first shell

• on the second shell

• on the third shell

• on the last shell

Multiple Choice

the mass number is...

• the protons plus the neutrons

• the protons plus the electrons

• the electrons plus the neutrons

Multiple Choice

what is the Bohr's model?

• a model of the atomic configuration of an atom

• a model of the proton

• a model of the neutron

• a model of the periodic table

Multiple Choice

the atomic number is...

• the number of protons

• the number of electrons

• the number of neutrons