Period 3 Elements Flashcards
1
Q
Sodium reaction with cold water
A
Vigorous reaction
Molten ball
Fizzing
Produces H2 gas
2
Q
Magnesium reaction with cold water and steam
A
Reacts very slowly with cold water Mg(OH)
Faster with steam, as more energy and forms MgO
3
Q
Flame tests
A
Na yellow
Mg white
P white
S blue
4
Q
What are the trends in melting points for period 3 oxides
A
MgO, Al2O3 and Na2O all are giant ionic lattices. Mg more strongly attracts O2-, and Al3+ is partially covalent.
Macromolecular SiO2.
Simple molecular P4O10 and SO3.
