Chemistry · May / June 2022 · Paper 42 · Question 3
0620
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The question as text
Transition elements are found in the middle block of the Periodic Table.
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3(a)(i)[2]
atom(s) of the same element
with different number of neutrons
3(a)(ii)[1]
55
3(a)(iii)[3]
24 protons;
28 neutrons;
21 electrons
3(b)(i)[2]
blue
pink
3(b)(ii)[2]
(act as) catalysts
variable oxidation state
3(c)(i)[1]
mobile electrons
3(c)(ii)[1]
malleability / malleable
3(d)[2]
high(er) density
high(er) melting points
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