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Flashcards in Ch 5 Section 2 Deck (67):
1

Stability o noble gases results from

The gases special electron configurations

2

Generally the electron configurations of an atoms highest occupied energy level governs

The atoms chemical properties

3

Elements are arranged vertically in periodic table in groups that share

Similar chemical properties

4

Periods

Horizontal rows
7 in the modern periodic table

5

Length of each period is determined by the number of

Electrons that can occupy the sublevels being filled in that period

6

The 1s sublevel is being filled in the

First period

7

1s sublevel can hold a total of

2 electrons, and thus, it consists of two elements

8

In the second period the following sublevels are being filled

2s
2p

9

2s sublevel can hold

2 electrons

10

2p sublevel can hold

6 electrons

11

Second period totals

8 elements

12

Filling of the 3s and 3p sublevels accounts for

The eight elements of the third period

13

Filling 3d and 4d sublevels in addition to s and p sublevels adds

10 elements to both the fourth and fifth periods
Thus each of these periods totals 18 electrons

14

Filling 4f sublevels in addition to s p and d sublevels adds

14 elements to 6th period which totals 32 elements

15

As new elements are created the 25 named elements in period 7 could be

Extended to 32

16

Period of an element can be determined from the

Elements electron configuration
(Coefficient in highest energy level= period)

17

Periodic table is divided into

4 blocks
S
P
D
F

18

Elements of the s block are chemically

Reactive metals

19

Group 1 metals are more reactive than

Those of group 2

20

The ease with which the single electron is lost helps to make the group 1 metals

Extremely reactive

21

The elements of group 1 of the periodic table

(Lithium, sodium, potassium, rubidium, cesium, francium) known as the alkali metals

22

In pure state all alkali metals have a

Silvery appearance and are soft enough to cut with a knife

23

Alkali metals are not found in

Nature as free elements

24

Alkali metals combine

Vigorously with most nobmetals and react strongly with water to produce hydrogen gas and aqueous solutions of substances known as alkalis

25

Alkali metals are usually stored in

Kerosene

26

Preceding down the volume the elements of group 1 melt at

Successively lower temperatures

27

The elements of group 2 of the periodic table

(Beryllium, magnesium, calcium, strontium, barium, radium) are called the alkaline earth metals

28

Atoms of alkaline-earth metals contain a

Pair of electrons in their outermost s sublevel

29

Group configuration for group 2 is

ns^2

30

Group configuration of group 1 is

ns^1

31

Group 2 metals are (comparison with alkali metals)

Harder
Denser
Stronger
Higher melting pts than alkali metals

32

Alkaline earth metals are also too

Reactive to be found in nature as free elements

33

Hydrogen does not share the

Same properties as elements of group 1
Unique element

34

Helium has ns^2 configuration like group 2 but is part of

Group 18

35

Because its highest occupied energy level is filled by two electrons helium possessed

Special chemical stability exhibiting the unreactive nature of a group 18 element

36

Group 2 metals have no

Special stability
Highest occupied energy levels aren't filled because each metal has an empty p sublevel

37

For energy level n there are

N possible sublevels

38

In addition to the two ns electrons of group 2 Atoms of the group 3 elements each have

One electron in the d sublevel of the (n-1) sublevel

39

Group configuration for group 3 is

(n-1)d^1ns^2

40

Atoms of the group 12 elements have

10 electrons in the d sublevel plus two electrons in the ns sublevel

41

Group configuration for group 12 is

(n-1)d^10ns^2

42

The d block elements are metals with

Typical metallic properties and are often referred to as transition elements

43

D block elements are

Good conductors of electricity and have a high luster
Typically Less reactive than alkali metals and alkaline earth metals

44

Some d block elements are so unreactive that they do not

Easily form compounds, existing in nature as free elements

45

Atoms of all p block elements contain

2 electrons in the ns sublevel

46

The p block elements together with the s block elements are called the

Main group elements

47

For group 13 elements added electron enters the

Np sublevel giving group configuration of ns^2np^1

48

Atoms of group 14 elements contain 2 electrons in p sublevel giving

ns^2np^2 for group configuration

49

Group configuration for 13-18

ns^2np^1-6

50

For atoms of p block elements the total number of electrons in the highest occupied level is equal to

The group number minus 10

51

At right hand end p block includes all of the

Nobmetals except hydrogen and helium

52

All six of the metallloids are also in the

P block

53

At the left hand side and bottom of the p block there are

Eight p block metals

54

The elements of group 17

(Fluorine, chlorine, bromine, iodine, astatine)
Are known as halogens

55

Halogens are the most reactive

Nonmetals

56

The reactivity of halogens is based on the presence of

7 electrons in their outer energy levels- one electron short of the stable noble gas configuration

57

Fluorine and chlorine are

Gases at room temp

58

Bromine is a

Reddish liquid

59

Iodine is a

Dark purple solid

60

Astatine is a synt

Synthetic element prepared in only very small quantities

61

Metallloids are located between

Nonmetals and metals in p block

62

Metals of the o block are generally

Harder and denser than the s block alkaline earth metals but softer and less dense than the d block metals

63

With exception of bismuth the metals of p block are sufficiently

Reactive to be found in nature only in form of compounds

64

The position of f block elements reflects the fact that

They involve the filling of the 4f sublevel

65

Lanthanides are shiny

Metals similar in reactivity to alkaline earth metals

66

Actinides are all

Radioactive
First four found naturally and remaining are lab made

67

Group 18 elements of the periodic table undergo

Few chemical reactions