Metals and non-metals

Question 1

6 main physical properties of metals:
appearance, melting point, conduction (2), density, form

Answer 1

-Shiny
-High melting points
-Good conductors of electricity
-Good conductors of heat
-High density
-Malleable

Question 2

6 main physical properties of non-metals:

Answer 2

-Dull
-Low melting points
-Poor conductors of electricity
-Poor conductors of heat
-Low density
-Brittle

Question 3

2 elements have properties that are not typical: (6)

Answer 3

mercury (metal):
-low melting point
-liquid at room temperature

graphite, a form of carbon (a non-metal)
-high boiling point
-good conductor of electricity

Question 4

what does a substance with a high density means?

Answer 4

it has a high mass for its size.

Question 5

what does a malleable substance mean?

Answer 5

can be bent or hammered into shape without shattering

Question 6

what does a brittle substance mean?

Answer 6

shatter when bent or hit.

Question 7

what does a ductile substance mean?

Answer 7

substance can be drawn out into a long wire without snapping or breaking.

Question 8

Metallic structure and bonding: (4)

Answer 8

-electrons leave the outer shells of metal atoms
-forming positive metal ions and a ‘sea’ of delocalised electrons.

-structure of solid metal consists of closely packed metal ions
-arranged in a regular way to form a metallic lattice structure.

Question 9

what is metallic bodning?

Answer 9

the strong electrostatic force of attraction between metal ions and delocalised electrons.

Question 10

why are metals malleable?

Answer 10

layers of ions can slide over each other when a force is applied.

Question 11

what does metallic bonding allow the material to do?

Answer 11

to change shape without shattering.

Question 12

explain the conduction of electricity in metals: (2)

Answer 12

-when voltage is applied to a metal, the delocalised electrons travel through the lattice structure.

-movement of these charged particles forms an electric current.

Question 13

summary of ionic compounds: (4)

Answer 13

-Metals and non-metals
-Loss and gain of electrons by atoms
-+ and - ions formed attract each other
-Ionic lattice structure

Question 14

summary of Simple covalent molecular: (4)

Answer 14

-Non-metals
-Share pairs of electrons between atoms
-Small groups of atoms held together
-A molecular structure

Question 15

summary of giant covalent network: (4)

Answer 15

-Non-metals
-Share pairs of electrons between atoms
-Billions of atoms are held together
-Giant covalent lattice structure

Question 16

summary of metallic bonding: (4)

Answer 16

-Metals
-Outer electrons free to move
-Billions of positive metal ions
-Giant metallic lattice structure