24.1 - Transition Elements

Question 1

Chromium Electron Arrangement - 24 electrons

Answer 1

1s2 2s2 2p6 3s2 3p6 3d5 4s1

Question 2

Copper electron arrangement - 29 electrons

Answer 2

1s2 2s2 2p6 3s2 3p6 3d10 4s1

Question 3

Why do Cu and Cr have half filled 4s subshells

Answer 3

More stable to have half/filled 4d subshells

Question 4

Transition elements definition

Answer 4

Defined as a d-block element that forms at least one ion with a partially filled d-orbital

Question 5

Elements that are d-block but NOT transition elements

Answer 5

Scandium and Zinc

Question 6

Purple Oxidation state ions Transition metals

Answer 6

Ti +3
V +2
Mn +7

Question 7

Green Oxidation state ions Transition metals

Answer 7

V +3
Cr +3
Mn +6
Co +3
Ni +2

Question 8

Blue Oxidation state ions Transition metals

Answer 8

V +4
Cr +2
Cu +2

Question 9

Yellow Oxidation state ions Transition metals

Answer 9

V +5

Fe +3

Question 10

Orange Oxidation state ions Transition metals

Answer 10

Cr +6

Question 11

Pink/ darker pink

Answer 11

Mn +4
Mn+2
Co +2

Question 12

Haber process catalyst

Answer 12

Finely divided iron

Question 13

2SO2 + O2 = 2SO3 catalyst

Answer 13

Vanadium (V) oxide [V2 O5]

Question 14

Hydrogenation of vegetable fats to make margarine catalyst

Answer 14

Nickel

Question 15

Hydrogen peroxide decomposition catalyst

Answer 15

Manganese (IV) oxide [Mn O2]