Chapter 8: Patterns and Properties of metals

Question 1

What are some characteristics of the alkali metals (group 1)?

Answer 1

increase reactivity down the group
very reactive with exothermic reactions
often found with other elements (+1)
test with flame test

Question 2

What are some characteristics of the alkaline earth metals (group 2)?

Answer 2

increase reactivity down the group
common metallic properties (+2)
they are strong reducing agents
react with halides to form ionic compound and react with oxygen to form oxides
test with flame test

Question 3

What are some characteristics of aluminum?

Answer 3

very common metal
low density, light but strong and a good electrical conductor
very reactive but has an aluminum oxide layer that protects it

Question 4

What are some uses of aluminum?

Answer 4

used in manufacture of aircraft
used in food containers because of corrosion resistance

Question 5

What are the tests for aluminum?

Answer 5

NaOH: forms white precipitate which dissolves in excess to form a colorless solution
NH3: forms a white precipitate which is insoluble in excess

Question 6

What are some physical properties of the transitional elements?

Answer 6

hard and strong
high melting points and densities
good electrical and heat conductors

Question 7

What are some chemical properties of the transitional elements?

Answer 7

not very reactive
useful for structural materials
form colorful compounds
have more than one oxidation state

Question 8

What is the metal reactivity series?

Answer 8

potassium
sodium
calcium
magnesium
aluminum
carbon
zinc
iron
tin
lead
hydrogen
copper
silver
gold
platinum

Question 9

How is the reactivity series of metals determined?

Answer 9

it’s determined by the metals ability to loose electrons and form a positive ion.

Question 10

What is an electrochemical cell?

Answer 10

when you connect two metals with a strip of wire and electrons flow between the metals which results in an electric current.