Metallic Bonding

Question 1

What are solid metal held together by?

Answer 1

Metallic bonding

Question 2

what happens to the metal atom in the lattice?

Answer 2

It is ionised and occupies a fixed position. (GML)

Question 3

How can the outer shell electrons move around?

Answer 3

They are delocalised

Question 4

What is the metal held together by?

Answer 4

Attraction between the positive ions and negative electrons (delocalised)

Question 5

What does the number of delocalised electrons depend on?

Answer 5

how many electrons have been lost by each metal.
Metals must have giant structures.

Question 6

Properties of metals

Answer 6

Good confuctors of heat and electricity (bc delocalised e-)
strong (FOA)
malleable and ductile (Layera)
high melting point substances. (strnger metallic bindinf the stronger the FOA)

Question 7

what happens to the elements across the period?

Answer 7

• get smaller
  -higher charge density
• so stronger metallic bonding

Question 8

what happens when you go down a period?

Answer 8

-get bigger
- lower charge density
- weaker metallic bonding

Question 9

How is metals good conductors of heat and electricity?

Answer 9

-delocalised electrons move freely throigh structyure
-ions are closely packed and so pass vibratinal energy on more effectively so good thermal conductor.

Question 10

what does the strength of the metallic bond depend on?

Answer 10

-charge and size of ion
-the stronger the metallic bond the higher the melting point

Question 11

why mighy aluminium have a h8gher boiling point than sodium?

Answer 11

-AL has a higher charge
-Al has a higher charge density
- bevause smaller ion
-so stronger force of attraction