metallic bonding

Question 1

metallic bonding

Answer 1

positive ions in a sea of delocalised electrons, held together by electrostatic forces of attraction.

Question 2

PURE METALS properties:

Answer 2

• high melting points; solid at room-temp.
• good conductors of electricity and heat (delocalised electrons).
• malleable.
• layers can slide over each other.

Question 3

alloys

Answer 3

2 or more different elements mixed together with different sized atoms (usually).
- different sizes disrupts the metals regular structure = layers can’t slide anymore = HARDER.

Question 4

alloys (A MIXTURE) are usually…

Answer 4

• a metal and another element
  OR…
• 2 metals

Question 5

in metallic bonding, each metal atom becomes an ion with a…

Answer 5

positive charge (by giving up their outer electron).

Question 6

steel is an…

Answer 6

alloy that is made mostly of iron (generally >99% iron), but with a small amount of other elements (most often carbon) added to it!!

Question 7

exam friendly definition:

Answer 7

the strucure is a regular lattice of positive ions in a sea of delocalised electrons.

Question 8

delocalisation

Answer 8

happens when an atom has a small amount of electrons in its valence shell.

Question 9

in metals, what do electrostatic attractions form between?

Answer 9

metal ions and delocalised electrons.