Ionic + Metallic bonding

Question 1

what is an alloy

Answer 1

mixture of a metal with atoms of another element

Question 2

explain why alloys are harder than pure metals

Answer 2

different sized atoms disturb layers, preventing them from sliding over each other

Question 3

4 properties of pure metals

Answer 3

-malleable
-high melting/boiling points
-good conductors of electricity
-good conductors of thermal energy

Question 4

describe structure and bonding of pure metal

Answer 4

Layers of positive metal ions surrounded by delocalised electrons
Strong electrostatic forces between metal and delocalised electrons

Question 5

when can ionic substances conduct electricity

Answer 5

when substance is melted or dissolved (not when solid due to no delocalised electrons)

Question 6

describe structure of giant ionic lattice

Answer 6

regular structure of alternating positive and negative ions, held together by electrostatic force

Question 6

describe structure of giant ionic lattice

Answer 6

regular structure of alternating positive and negative ions, held together by electrostatic force

Question 7

Name the force that holds oppositely charged ions together

Answer 7

electrostatic force

Question 8

which kinds of elements form ionic bonds

Answer 8

metals + non-metals