Chemistry of the Elements Flashcards Preview

Chemistry > Chemistry of the Elements > Flashcards

Flashcards in Chemistry of the Elements Deck (37):
0

Group

Is a column of elements (going down)

1

Period

Row of elements across the table

2

Left of the periodic table is.....

METALS

3

The right of the table is...

NON-METALS

4

Metal properties

•conduct electricity
•metal oxides are BASIC

5

Non - metals properties

•do not conduct electricity
•non-metal oxides are ACIDIC

6

Elements in the same group have...

Similar chemical properties

7

Elements in the same group have ...

The same number of electrons in their outer shell

8

Chemical properties are determined by the number of.......

Electrons in the outer shell

9

Noble gasses

•group 0
•are all inert/unreactive
•have full outer shells of electrons

10

REACTION OF GP1 METAL + WATER:
Lithium

•floats
•fizzes + colourless gas
•solid disappears
•colourless solution forms

11

REACTION OF GP1 METAL + WATER:
Sodium

•floats
•skates around surface
•melts into a ball
•solid disappears
•fizzes + colourless gas
•colourless solution forms

12

REACTION OF GP1 METAL + WATER:
Potassium

•floats
•ignites on contact + burns with lilac flame
•skates around
•solid disappears (melts into a ball)
•colourless solution forms

13

Group 1 + water =
Metal

Metal + hydrogen
Hydroxide

14

Reactivity of gr1 elements INCREASES as you go ...... The ........ .

Down the group.

15

What colour is CHLORINE and it's physical state?

GREEN and GAS.

16

What colour is BROMINE and it's physical state?

RED/BROWN and LIQUID.

17

What colour is IODINE and it's physical state?

GREY had SOLID.

18

Hydrogen chloride - simple molecular covalent GAS. What does hydrogen chloride become in WATER?

Hydrochloric acid (aq).

19

When hydrogen chloride is dissolved in water it becomes DISSOCIATED INTO IONS

HCL(g) + H2O = HCL(aq) ~ H+(aq) + Cl-(aq)

20

Reactivity increases .... The group

Up the group

21

Oxidation Is the ...... of electrons

Loss

22

Reduction Is the ...... of electrons

Gain

23

Half equation for reduction

Cl2 + 2e- = 2Cl-

24

Half equation for oxidation

2Br- = Br2 + 2e-

25

RUSTING of IRON: experiment
(iron wool)

Test tube upside down in beaker of water with 2 elastic bands - 1 shows the starting position of the water as the second shows the position over a period of time after water level rises and you determine the volume with water in tube to each level and pour into measuring cilinder.

26

METAL CARBONATES DECOMPOSE ON HEATING TO PRODUCE CARBON DIOXIDE

Copper = Copper oxide + carbon dio
Carbonate

27

What's the equation for the preparation of carbon dioxide

Calcium + Hydrochloric=calcium
Carbonate Acid. Chloride

+water +carbon dioxide

28

What are the properties of co2?

•colourless, odourless
•more dense than air
•slightly soluble in water

29

What are the uses of carbon dioxide?

•carbonating drinks (fizzy drinks)
•fire extinguisher

30

What's the equation for the preparation of hydrogen?

Acid + metal = salt + hydrogen

31

Hydrogen burns to form water. What is the equation for the COMBUSTION OF HYDROGEN?

2H2 + O2 = 2H2O

32

CHEMICAL TEST FOR WATER:

Anhydrous copper sulphate
(WHITE powder) turns BLUE

33

What is the CHEMICAL equation for the chemical test for WATER?

CuSO4 + H2O = CuSO4.5H2O

34

TESTS FOR ANIONS:
Halide test (Cl-,Br-,I-)

To a solution of the halide add DILUTE NITRIC ACID and then SILVER NITRATE SOLUTION.
Results:
Chloride Cl- ~ white precip
Bromide Br- ~ cream precip
Iodide I- ~ yellow precip

35

TESTS FOR ANIONS:
Sulphate test (SO4 2-)

To a solution of the unknown SULPHATE add dilute HYDROCHLORIC ACID followed by BARIUM CHLORIDE SOLUTION .
Results:
Sulphate ion, SO4 2- ~ white precip

36

TESTS FOR ANIONS:
Carbonate test (CO3 2-)

To unknown carbonate add DILUTE HYDROCHLORIC ACID and test any gas involved by bubbling through lime water
Results:
Carbonate CO3 2-