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Flashcards in periodic table Deck (31)
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1
Q

period

A

rows

2
Q

group

A

column

3
Q

metals

A

on the left of the zigzag

4
Q

metals electrical conductitity

A

conduct electriicty because they allow charge to pass through them easily

5
Q

metals acid-base character of oxides

A

metal oxides are basic, this means they will neutralise acids
those which dissolve will form solutions with a PH more than 7

6
Q

non metals

A

the elements on the right of the zig zag

7
Q

non metals electircal conducitity

A

poor conductors of electricity

8
Q

non metals acid- base character of oxides

A

they are acidic, they dissolve in water to form solutions with a PH less than 7

9
Q

noble gases

A

group 0

they are inert (don’t react with much at all)

the reason of this is because they have a full outer shell of electrons and the are not desperate to give up or gain electrons.

10
Q

why do elements in the same group have similar chemical properties

A

because they have the same number of electrons in their outer shell

11
Q

the properties of elements..

A

such as reactivity often gradually change as you go down a group

12
Q

reaction to find out if it is a group one element

A

when lihium, sodium and potassium are put in water, they all react vigorously

this reaction produces a metal hydroxide solution. This solution is alkaline

the reaction of the alkali metals with water also produces hydrogen, this is why you can see fizzing.

13
Q

group one metals are also called

A

alkali metals

14
Q

group one reactivity

A

the elements in group 1 get more reactive as the atomic number increases

lithim, sodium, potassium

15
Q

group seven

A

halogens

16
Q

chlorine

A

green

physical state at room temp - gas

bp: -34 degrees c

17
Q

bromine

A

red-brown

physics state at room temp - liquid

bp: 59 degrees c

18
Q

iodine

A

dark grey

physics state at room temp - solid

bp: 185 degrees c

19
Q

as the atomic number of halogens increase

A

the elements have a darker colour and higher bp

20
Q

the higher up group 7 an element is

A

the more reactive it is , because the shell with the missing electron is nearer to the nucleus, so the pull from the positive nucleus is greater

21
Q

why is hcl acidic in water

A

when hydrogen chloride is dissolves in water the hcl molecules split up into H+ ion and CL- ions, this process is called dissociation

the solution formed is hydrochloric acid

22
Q

if you test a solution of hcl with blue litmus

A

it turns red/pink

23
Q

if hcl is dissolved in an organic solvent like methylbenzene

A

it doesnt dissociate into H+ and Cl- ions, this means there are no H+ ions produced so it is not acidic

24
Q

test to see which halogens are most reactive

A

add a few drops of the halogen solution to the salt solution then look for a colour change

25
Q

potassium bromide reaction with chlorine water

A

orange solution (BR2)

26
Q

potassium ioddide olution reaction with bromine water

A

brown solution (I2) formed

27
Q

potassium iodide solution reaction with chlorine water

A

brown solution (I2) formed

28
Q

in displacment reactions…

A

redusction and oxidation are occurring simalraneously

29
Q

oxidising agent

A

accepts electrons and gets reduced

30
Q

reducing agent

A

donated electrons and gets oxidised

31
Q

manufacture of ammonia (the haber process)

A

you need nitrogen from air and hydroegn from natural gas or the cracking of hydrocarbons