period 3 elements and oxides Flashcards
why is sodium more reactive than magnesium
because when sodium reacts it only needs to lose one electron and this takes less energy
how does sodium react with cold water and what are the products
it will react vigorously with cold water to form a molten ball on the surface, it will produce sodium hydroxide and H2 gas, the solution is alkaline due to the sodium hydroxide produced
how does magnesium react with cold water
reacts very slowly with cold water, it forms a weak alkaline solution and a thin coating of magnesium. the soltuion is weak because magnesium hydroxide isnt very soluble in water
why does magnesium react faster with steam
because theres much more energy to form magnesium oxide
what do period 3 elements form when they react with oxygen, what are they oxidised to?
1
what is the exception to the rule of period 3 elements reacting with oxygen and being oxidised
1
what is the trend in reactivity with air as you go along period 3 in the periodic table
1
why do Na2O, MgO and Al2O3 have high melting points
1
why does MgO have a higher melting point than Na2O
1
why does Al2O3 have a lower melting point than Na2O
1
why does SiO2 have a higher melting point than other non metal oxides
1
why does P4O10 and SO2 have relatively lower melting points
1
what happens when the ionic oxides of Na and Mg are dissolved in water
1
what happens when the simple covalent oxides of phosphorus and sulfur are dissolved into water
1
what happens when silicon dioxide is dissolved in water
1
