4.2 Isotopes, ions and periodic table

Today
- Atoms
- Isotopes
- Ions
- Periodic Table
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Slide 1: Slide
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This lesson contains 15 slides, with interactive quizzes and text slides.

time-iconLesson duration is: 60 min

Items in this lesson

Today
- Atoms
- Isotopes
- Ions
- Periodic Table

Slide 1 - Slide

Symbol
Atomic number
Mass number
#protons
#neutrons
#electrons
Na
23
11
7
Zn
30
36
30
C
15
7
7
Cl
17
36
17
11
12
66
30
7
8
19
17

Slide 2 - Drag question

How many electrons are there in the K-,L- and M-shell of Magnesium?
A
K:2, L:8:M:2
B
K:2, L:4, M:6
C
K:2, L:6, M:4
D
K:2, L:2, M:8

Slide 3 - Quiz

Isotopes
- Different isotopes of a single element occupy the same position on the periodic table. 
- Two types: those found in nature and those found in laboratory

Slide 4 - Slide

Isotopes
- An isotope is an atom of the same kind with a different atomic mass
- The number of protons is always the same
- The number of neutrons can change

Slide 5 - Slide

Copper: 2 isotopes in nature

Slide 6 - Slide

What changes when you deal with isotopes?
A
The atomic mass and the number of elektrons
B
The atomic number and the amount of neutrons
C
The atomic number and the amount of elektrons
D
The atomic mass and the amount of neutrons

Slide 7 - Quiz

Ions
- Special group of atoms where the charge is not 0. 
- Charge=#protons-#elektrons
- Number of electrons can change, not the amount of protons

Slide 8 - Slide

How many protons and electrons are there in a Ca2+ - ion
A
20 protons, 20 electrons
B
20 protons, 18 electrons
C
18 protons, 20 electrons
D
18 protons, 18 electrons

Slide 9 - Quiz

Slide 10 - Slide

Periodic table
- Schematic representation of all the elements we know
- Row: period (7)
- Column: group (18)
- Atomic mass gets bigger from left to right

Slide 11 - Slide

Slide 12 - Slide

Important groups:

- Group 1: Alkali metals
- Group 2: Alkaline earth metals
- Group 17: halogens
- Group 18: nobel gasses
All elements want to be a nobel gas, because they are unreactive with perfectly filled shells. Halogens are only one step away from the nobel gasses so they are super reactive. 

Slide 13 - Slide

Mneumonic
Name
Molecule
Brenda
Bromine
Br2
Organises
Oxygen
O2
Nude
Nitrogen
N2
Feasts
Fluorine
F2
In
Iodine
I2
Her
Hydrogen
H2
Club
Chlorine
Cl2

Slide 14 - Slide

Homework
- Finish questions in 4.1
- Read theory in 4.2
- Exercises of 4.2

https://www.youtube.com/watch?v=m55kgyApYrY

Slide 15 - Slide