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2.2 The Periodic table and Chemical Properties

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1 2.2 The Periodic table and Chemical Properties

2 Arrange the following shapes into a pattern of rows and columns that is logical.

3 Dmitri Mendeleev + VIDEO
Just like you, he searched for patterns among elements He wrote important properties of each known element on a card and he tried to sort them out... many, many, many times And just like you, he tried to arranged them based on their properties into rows and columns

4 Dmitri Mendeleev According to which properties do you think he tried to arrange the elements?

5 Firstly, based on atomic mass (in rows)
Dmitri Mendeleev Firstly, based on atomic mass (in rows) Then he started another row when an element with similar properties was found

6 Complete Think About It 2-2A Periodic Puzzle
1. Arrange them first based on ATOMIC MASS into a long row 2. Then find an element that has very similar properties as the very first element (terryfoxium) 3. Put that element below terryfoxium, and repeat the step 2 for the element next to terryfoxium

7 Complete Think About It 2-2A Periodic Puzzle
HINTS: There will be more than 3 but less than 7 columns Some elements might be missing atomic mass DOES NOT have to increase from left to right (1 case)

8

9 All form compounds with R with 1:1 ratio
All are conductors B.Ps range around 1000˚C and decreasing going down the group

10 All form compounds with R with 1:2 ratio
All are conductors B.Ps range around ˚C and decreasing going down the group All form compounds with R with 1:1 ratio All are conductors B.Ps range around 1000˚C and decreasing going down the group

11 All form compounds with R with 1:2 ratio
All are conductors B.Ps range around ˚C and decreasing going down the group All form compounds with L with 1:2 ratio Each element can forms a compound with itself B.Ps are increasing going down the group All form compounds with R with 1:1 ratio All are conductors B.Ps range around 1000˚C and decreasing going down the group

12 All form compounds with R with 1:2 ratio
All are conductors B.Ps range around ˚C and decreasing going down the group All form compounds with L with 1:2 ratio Each element can forms a compound with itself B.Ps are increasing going down the group Element missing All form compounds with T with 1:1 ratio Mostly non-conductors B.Ps are increasing going down the group All form compounds with R with 1:1 ratio All are conductors B.Ps range around 1000˚C and decreasing going down the group

13 All form compounds with R with 1:2 ratio
All are conductors B.Ps range around ˚C and decreasing going down the group All form compounds with L with 1:2 ratio Each element can forms a compound with itself B.Ps are increasing going down the group Element missing All form compounds with T with 1:1 ratio Mostly non-conductors B.Ps are increasing going down the group All DO NOT form compounds ALL are non-conductors B.Ps are ALL negative increasing going down the group All form compounds with R with 1:1 ratio All are conductors B.Ps range around 1000˚C and decreasing going down the group

14 Dmitri Mendeleev He found out (just like you) that there is a horizontal and a vertical pattern in arranging the elements based on their properties

15 Dmitri Mendeleev He also predicted (just like you) the properties and the placement of the elements STILL YET TO BE DISCOVERED!

16 The Periodic Table a chart that organizes the elements according to their physical and chemical properties. gives each element’s name, symbol, atomic number, atomic mass, and ion charge(s)

17 What is the ATOMIC NUMBER of potassium?
the number of protons in the nucleus or the number of electrons (in a neutral atom)of each atom of an element What is the ATOMIC NUMBER of potassium?

18 What is the pattern of ATOMIC NUMBERS in the Periodic Table?
INCREASING

19 What is the ATOMIC MASS of potassium?
the average mass of an atom of an element Atomic mass ≈ # of protons + # of neutrons Always written as a decimal number and measured in amu (atomic mass units) What is the ATOMIC MASS of potassium?

20 What is the pattern of ATOMIC MASSES in the Periodic Table?
INCREASING

21 What is the ION CHARGE of potassium?
an electric charge that forms on an atom when it gains or loses electrons What is the ION CHARGE of potassium?

22 K K+ Potassium Potassium ION Ion Charge NEUTRAL ATOM
an electric charge that forms on an atom when it gains or loses electrons K K+ Potassium NEUTRAL ATOM Potassium ION

23 Did potassium lose or gain electron(s)?
Ion Charge Did potassium lose or gain electron(s)? How many electron(s)? K K+ Potassium ATOM Potassium ION

24 Ion Charge Some elements have a multiple ion charge.
These elements can form ions in more than one way.

25 QUICK CHECK What is the atomic mass of this atom?
What is the atomic number of this atom? What is (are) the possible ion charge(s) on this atom? Did it gain or lose electrons? How many?

26 Workbook – page 28

27 The Periodic Table

28 The Chemical Elements

29

30 Make a table similar to this
State at Room Temperature Appearance Conductivity Malleability and Ductility METALS NON – METALS METALLOIDS

31 Metals

32 Metals State at Room Temperature All solid except…

33 Metals State at Room Temperature Hg is liquid at RT

34 Metals Shiny Lustre Lustre = soft glow State at Room Temperature
Appearance

35 Good conductors of heat and electricity
Metals Good conductors of heat and electricity State at Room Temperature Appearance Conductivity

36 Malleability and Ductility
Metals Both State at Room Temperature Appearance Conductivity Malleability and Ductility

37 Non - Metals

38 Non - Metals State at Room Temperature Solids Gases Liquids (only Br)

39 Non - Metals State at Room Temperature Not very shiny Appearance

40 Poor conductors of heat and electricity
Non - Metals Poor conductors of heat and electricity State at Room Temperature Appearance Conductivity

41 Malleability and Ductility
Non - Metals Brittle, not ductile State at Room Temperature Appearance Conductivity Malleability and Ductility

42 Metalloids Solids State at Room Temperature

43 Metalloids Can be shiny or dull State at Room Temperature Appearance

44 No conduction of heat but may conduct electricity
Metalloids State at Room Temperature No conduction of heat but may conduct electricity Appearance Conductivity

45 Malleability and Ductility
Metalloids Brittle, not ductile State at Room Temperature Appearance Conductivity Malleability and Ductility

46 GROUPS or FAMILIES 1 – 18

47 PERIODS or ROWS (1 – 7)

48 SOME GROUPS OF THE PERIODIC TABLE

49 THE ACTUAL THE PERIODIC TABLE

50 Where are the following?
The Periodic Table INCREASING REACTIVITY Where are the following? Atomic number Period Group/Family Metals Non-metals Transition metals Metalloids Alkali metals Alkaline earth metals Halogens Noble gases

51 Where are the following?
Worksheet #1 INCREASING REACTIVITY Where are the following? Atomic number Period Group/Family Metals Non-metals Transition metals Metalloids Alkali metals Alkaline earth metals Halogens Noble gases

52 Building Spectroscope
What is it? A spectroscope is a device that lets us find out what things are made of. It works by taking light and splitting it up into its component colors.

53 Building Spectroscope
Astronomers use powerful spectroscopes and computers to study the composition of stars and planets millions of light years away from Earth.

54 Building Spectroscope
This is what our spectroscope will look like....

55 Alkaline Earth Metals State at Room Temperature

56 Halogens State at Room Temperature

57 Noble Gases State at Room Temperature

58 Think About It 2-2B Textbook:

59 WORKBOOK Pages:

60 2.2 QUIZ Date: Thursday, Dec 19

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