A3a - Ch 3.4 Structure of atoms - lesson 3

• Middelbare school

Chapter 3

Building blocks of substances

Ch 3.4 Structure of atoms - lesson 3

Welcome!

Online lessons chemistry

• Goal of the lesson

• Practice assignment - discuss assignment
  


• What do I know and what am I going to work on?

• Question - use the raise hand button and type your question. 

--> I will answer them a moment later. 

In the lesson you need:

• notebook and pen / tablet 

1.   notes 
2.   assignments
   

• phone / tablet to participatie in LessonUp

This lesson:

• Practice with atomic number and atomic mass.

Book: Ch3.4 p. 91-94

Homework: make mindmap Ch 3.4

    camera on 

    sound off

0

What is a carbon atom made of?

What is a carbon atom made of?

What do the solar system and an atom have  in common?

Atomic model by Bohr

A substance is made up of molecules.

Molecules are made up of atoms.

An atom is made up of:

• a nucleus containing protons and neutrons
• electrons in orbits around the nucleus

Take notes

Information about an atom in the periodic table

Atomic number equals:

• number of protons
• number of electron

Carbon has 6 protons and 6 electrons.

And oxygen has ... ?

Information about an atom in the periodic table

Atoms can also be represented differently, as C-12 or as the figure below

12 indicates the atomic mass

6 indicates the atomic number

C is the symbol 

The atomic number = number of protons = number of electrons

The atomic mass = number of protons + number of neutrons

Carbon has 12 - 6 = 6 neutrons

(the number of protons does not have to be equal to the number of neutrons!)

In the nucleus of an atom you can find?

1. electrons and neutrons
2. electrons and protons
3. neutrons and protons
4. electrons, protons and neutrons

The total mass of protons and neutrons is the atomic mass.

The atomic number of an atom tells you?

1. The number of electrons in an atom.
2. The number of neutrons in an atom.
3. The number of protons in an atom.
4. Nothing.

Group assignment

What to do:

• Open the worksheet 'Built an atom in classroom'
• Answer the questions of the worksheet.  
• Work together and discuss the answers. 

Goal: 

• Finish questions 1-5 
  
• You can make question 3 if you would like to know more
  

Questions? Raise your hand and type it.

This lesson:

• What does an atom look like
• Atomic number and atomic mass 

Book: Ch3.4 p. 91-93

Homework: 

• Finish the worksheet
  

Hand in in classroom: 

• Answers to questions 6 and 7 
  

Group assignment

Online lessons chemistry

• Goal of the lesson

• Short explanation of the chapter

• Practice assignment - discuss assignment
  
• Group assignment
• What do I know and what am I going to work on?

In the lessen you need:

• notebook and pen / tablet 

1.   notes 
2.   assignments
   

• phone / tablet to participatie in LessonUp

This lesson:

• What does an atom look like
• Atomic number and atomic mass 

Book: Ch3.4 p. 91-93

Homework: Built an atom - worksheet 

Finish the two sentences.
1. I know that ...
2. I will work on ...
Done? You may leave the lesson. Homework is in magister.