atomic structure

• Natuurkunde / Scheikunde
• Middelbare school
• vwo
• Leerjaar 2

Lesson goals:

At the end of the lesson I can find in the periodic table:

- how many protons and electrons are in an element;

- what the atomic mass of an element is;

- how many neutrons are in an element;

- if an element is a metal or not. 

I can calculate:

- atomic mass, molecular mass and % by mass of an element in a molecule

Questions?

The atomic mass of sodium is?

1. 11 u
2. 12 u
3. 23 u
4. 34 u

What is the atomic mass of this atom?

1. 7 u
2. 14 u
3. 21 u
4. 28 u

What is the atomic mass of one nitrogen (N) atom?

What is an isotope?

1. same atom, different mass
2. different atom, same mass
3. same atom, different atomic number
4. different atom, same atomic number

Isotopes differ in ...

1. Amount of protons
2. Amount of electrons
3. amount of protons and electrons
4. Amount of neutrons

Let's discuss this picture, What is incorrect?

Let's practice

1. A41 and A42 together
2. B43 do by yourselves 
3. B45 = homework for Wednesday
4. B44 till B49 = homework this week.