Electrons

Electrons

Poll

Have you got dirty dishes in your bedroom right now?

• Yes

• No

Multiple Choice

The 2 subatomic particles found in the nucleus are:

• Protons and neutrons

• Protons and electrons

• Neutrons and electrons

• Only neutrons are found in the nucleus

Multiple Choice

Which of the following is correct?

• Protons are positive, electrons have no charge and neutrons are negative

• Protons have a negative charge, neutrons are neutral and electrons are negative

• Protons have a positive charge and neutrons have no charge and electrons have a negative charge

Multiple Choice

To calculate the atomic mass of an atom...

• Find the sum of the electrons and neutrons

• Find the sum of the protons and electrons

• Find the sum of the protons and neutrons

• Find the sum of all the protons, neutrons and electrons don't weigh anything

Multiple Choice

Which is an electron?

• A
• B
• C

Multiple Choice

What is the number of protons that the element in this image contain?

• 14
• 7
• 15
• 18

Multiple Choice

Particles in an atom that are neutral and have no charge are ______. 

• Negatrons 
• Electrons 
• Neutrons 
• Protons 

Bohr Model

We know that the nucleus contains protons and neutrons. The electrons orbit the nucleus in fixed paths called energy levels or shells.

Each shell can hold a certain number of electrons:

• 1st shell = 2 electrons

• 2nd shell = 8 electrons

• 3rd shell = 8 electrons

• Electrons fill from the inside out

• If you're writing out the configuration, use this format: 2,8,1 (example for sodium).

Things to Remember

​Can you guess what element this is?

​

Time to practise:

1. In pairs, grab a whiteboard and marker.

2. I will tell you an element, and the first group to successfully do all of the following win a stripe.

​You need to include:

• Atomic Number

• Atomic Mass

• A correct Bohr diagram, including all subatomic particles

1. Cut out the worksheet and glue it into your books.

2. Complete the Bohr models for the first 20 elements.

​

In your books:

Multiple Choice

What element is represented in this Bohr Model? 

• Carbon
• Hydrogen
• Aluminum
• Lithium

Multiple Choice

How many electrons total?

• 5

• 6

• 7

• 8

Multiple Choice

What is the name of this element?

• Lithium
• Boron
• Carbon
• Neon

Multiple Choice

Name this element.

• Boron

• Sodium

• Magnesium

• Lithium

• Beryllium

Multiple Choice

Electron live in something called __________.

• Nucleus

• Orbits

• Shells or Energy Levels

• Valences

Multiple Choice

How many electrons can go in the first energy level?

• 2

• 8

• 18

• 32

Multiple Choice

How many electrons can go in the second energy level?

• 2

• 8

• 18

• 32