Video “Basic atomic structure” https://www.youtube.com/watch?v=lP57gEWcisY
1.
2.
3.
4.
Where is the nucleus of an atom? In the centre
Which charge do the neutrons have? No charge
What is the velocity of the electrons in the atom? ¾ of the speed of light
Why the electrons don’t escape from the atom? Because of the force of
attraction between positive and negative charges
5. Which element has eight protons and eight electrons? The oxygen atom
6. How many protons have an iron atom? Twenty-six
Video “Atomic orbitals – electron configuration of Scandium (Z=21)”
https://www.youtube.com/watch?v=sMt5Dcex0kg
Video “Un átomo de carbono a escala”
http://www.youtube.com/watch?feature=player_embedded&v=067hQSV4exA
Video “Just how small is an atom?” https://www.youtube.com/watch?v=yQP4UJhNn0I
1. Where is the nucleus of an atom?
2. Which charge do the neutrons have?
3. What is the velocity of the electrons in the atom?
4. Why the electrons don’t escape from the atom?
5. Which element has eight protons and eight electrons?
6. How many protons have an iron atom?
1. Where is the nucleus of an atom?
2. Which charge do the neutrons have?
3. What is the velocity of the electrons in the atom?
4. Why the electrons don’t escape from the atom?
5. Which element has eight protons and eight electrons?
6. How many protons have an iron atom?