transition elements

Question 1

where are transition elements found ?

Answer 1

on the centre of the periodic table

Question 2

what are properties of transition elements?

Answer 2

• hard and strong metals
• high boiling points (except mercury which is liquid at room temperature)
• high density
• much less reactive than group 1 metals when reacting with O2, Cl2 and H2O
• Can form ions with different charges e.g Fe 2+, Fe 3+, Ni 2+, Ni 4+
• form coloured compounds
• can be used as catalysts(speeds up a chemical reaction)

Question 3

compare the properties of the alkali metals with the properties of the transition elements

Answer 3

•alkali metals are soft and can be cut with a knife
-transition elements are hard and strong
•alkali metals have a low density
-transition elements have a high density
•alkali metals are very reactive
-transition elements are much less reactive than group 1 metals when reacting with O2, Cl2 and H2O
•alkali metals form +1 ions only
-transition metals can form ions with different charges

Question 4

what’s special about the compounds formed from transition elements?

Answer 4

they form coloured compounds

Question 5

what can transition elements be used as?

Answer 5

catalysts

Question 6

what are catalysts?

Answer 6

a substance that increases the rate of a chemical reaction without itself undergoing any permanent chemical change