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OCR CHEMISTRY A PAPER H432 01 MARK SCHEME SET 1 ACTUAL EXAM PAPER 2026 COMPLETE QUESTIONS AND ANSWERS GRADED A+

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OCR CHEMISTRY A PAPER H432 01 MARK SCHEME SET 1 ACTUAL EXAM PAPER 2026 COMPLETE QUESTIONS AND ANSWERS GRADED A+

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OCR CHEMISTRY A PAPER H432 01 MARK
SCHEME SET 1 ACTUAL EXAM PAPER 2026
COMPLETE QUESTIONS AND ANSWERS
GRADED A+

⩥ Ionisation energy down a group. Answer: atomic radius increases
shielding increases
nuclear charge decreases
nuclear attraction to outer electrons decreases
1st I.E decreases


⩥ Ionisation energy across a period. Answer: atomic radius decreases
similar shielding
nuclear charge increases
nuclear attraction to outer electrons increases
1st I.E increases


⩥ Ionisation graphs. Answer: Large jump = new shell


e.g. oxygen
large increase from 6-7th I.E

, therefore must have 6 electrons in outer shell
therefore must be in group 6


⩥ Ionic bonding. Answer: Strong electrostatic attraction between
oppositely charged ions (between metals and non-metals)


Melting/boiling point:
-high
-large amount of energy required to over come electrostatic attraction
between oppositely charged ions


Electrical conductivity:
solid- no, fixed lattice
molten/aq- yes, mobile ions


⩥ Simple Covalent bonding. Answer: The strong electrostatic attraction
between a shared pair of electrons and the nuclei of the bonded atoms
(between 2 non-metals)


Melting/boiling point:
-low
-only london forces
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