Look at the picture.

Date: 2015-10-07; view: 438.

Vocabulary

What is it shown here?

Can you label all the structural components?

What do you know about the atomic structure and how is it related to electricity?

2. Match the words with their definitions:

Atom

Electron

Proton

Neutron

Nucleus

Charge

- a positively charged part of an atom.

- the force inside the atom that is responsible for electrical phenomena, existing in a positive or negative form.

- a part of an atom with no charge (electrically neutral).

- the positively charged center of an atom.

- very small parts of an atom, the only that moves.

- the basic unit of matter.

3. Remember your school Physics and fill in the gaps in the text using the words from the box:

Everything in the universe consists of ________, which are made up of smaller particles. The main three particles composing an atom are ________ , ________ and ________. ________ and ________ make up the center of an atom - a __________. ________ spin around it in their orbits a great distance from the __________.

Protons and electrons both carry an electric _______ , i.e. a force inside the particle. ________ contain a negative _______ (-), while ________ contain a positive _______ (+). _______ are neutral – they have neither a negative nor a positive _________. The positive charge of _________ is equal to the negative charge of _________ . Opposite charges attract each other.

Each ________ has a specific number of _________, _________ and neutrons. The number of protons usually needs to be the same as the number of ___________. This brings the overall charge of the atom to zero.

Electrons can be made to move from one _________ to another by some external forces. When those ___ _____ move between the atoms an electric flow is produced. The flowing _________ make electricity.

4. Check your groupmate being right. Ask the questions:

1) What are the subatomic particles of a typical atom?

2) Which particles make up the nucleus?

3) What is electric charge? Which particles have charges? What type of charges?

4) Is the number of protons and electrons in the atom the same or different?

5) What is the charge of the atom with equal number of protons and electrons?

6) What is the charge of an atom if it gains extra electrons / loses electrons?

7) What is electricity?

5. Restore the statements:

a) the movement between of electrons electricity is atoms

b) around nucleus electrons the spin

c) that of electrons moves atom the part an are only

d) electricity electrons make moving

e) charges other opposite each attract, each repel like other charges

a) ________________________________________________________________

b) ________________________________

c) ________________________________________________________________

d) ________________________________

e) ________________________________________________________________