period 3

Question 1

why is sodium more reactive than magnesium?

Answer 1

-sodium takes less energy to lose 1 electron than to lose 2, so more energy is needed to for Mg to react

Question 2

give observations for when sodium reacts with water:

Answer 2

-vigorously with cold water
-molten ball on surface
-fizzing
-produces h2 gas
-strongly alkanline

Question 3

whats the ph of sodium when reacting with water?

Answer 3

-12-14

Question 4

observattions when magnesium reacts with water

Answer 4

-very slow with cold water
-weakly alkaline solution
-thin coating of magensium hyroxide on the surface of metal
-few hydroxide ions formed
-not very soluble

Question 5

why does magnesium react faster with steam?

Answer 5

-as it has high temp so more energy

Question 6

which element, when reacting with oxygen, combusts?

Answer 6

-phosphorus

Question 7

which element, when reacting with oxygen, burns?

Answer 7

-sulfur

Question 8

which elements have the highest melting point/

Answer 8

-na, mg, al as they have giant ionic lattices, have strong forces of attraction

Question 9

which elements have the lowest melting point?

Answer 9

-phsphorus and sulfur as they have simple molecular structures weak IMF vander walls

Question 10

why is mg MP higher than Na?

Answer 10

-mg forms 2+ ions so bonds more strongly