Summary Period 3 Elements Oxides Reacting With Water

3.2.4.2 - Period 3 Elements Reacting With Water & Oxygen

Benod 3 elements Reacting with water
only 2 penod elements conveact
w ith water;


socium

magnesium
Sodium andMagnesium are 213 ofthe metals m Penod 3

they both have magnesium has
high melting pants, but a higher melting point;

& Mghtlons have a stronger attractic to delocalisedelections that Nations
both are silvery metAIS

socium as quite a soft, silvery metal, which toinishes quickly on the out

magnesium hardertha sodium often as a magnesium abson




socium Reacting with water
with coldwater;
socium careact

sodum metal water. * sodium hydroxide
hydrogen gas
+




2Nd(s) 2H28() +

a2NG0Hcaq) H2(g) +




observations;
reacts
agarouly
Sodium form a molter ball on the surface


12279
hydrogel gas
exothermic react
a

the sodium hydroxide produced a coloness solutia

* allcaline pH13-14
=




Magnesium Reacting with water
magnesium reacts with coldwater;


magnesium solid water * magnesium hydroxide hydrogen +
gas


Mg(s 2H20a)
+
Mg (OH) zcaq) H2
& +
(g)
observations;

slow react a

↑ New bubbles

the
magnesium hydroxide produced a colourless solution

* Slightly alkaline:
PH9-10

ned in milk ofmagnesiato neutralise excess and treat
to constipatio
*




Magnesium Reacting with steam
magnesium reacts with steam;

magnesium said steam magnesium oxide hydrogen gas
+




Mg(s) H28(g) *
M90cs) H2cg)
+ +




Observatia

fasterreactio

Dright, white name


hydrogen gas