The newest 8 of 8 written questions. Open one to see it on the real paper.
Name this type of combustion reaction.
See it on the paper →Which symbols represent the ions in magnesium nitrate?
See it on the paper →Describe what happens when an atom of lithium becomes an ion of lithium.
See it on the paper →Magnesium sulfate contains magnesium ions, Mg 2+ . Describe how magnesium ions are formed from magnesium atoms.
See it on the paper →State two differences between the chlorine atom and the chloride ion shown in Fig. 2.1.
See it on the paper →Describe what happens to sodium atoms and to chlorine atoms when they react together. Use ideas about electrons in your answer. sodium atoms chlorine atoms
See it on the paper →Deduce the number of electrons in one Ca 2+ ion.
See it on the paper →When sodium reacts with chlorine, sodium chloride is formed. Fig. 5.3 shows the electronic structures of a sodium atom and of a chlorine atom. sodium atom chlorine atom Fig. 5.3 Sodium chloride contains sodium ions and chloride ions. Complete Fig. 5.4 to show the electronic structures of a sodium ion and a chloride ion...
See it on the paper →Most candidates found this question challenging. The answer required a description of the loss of an electron by a lithium atom. There were many incorrect answers, including changes in electrons, the gain of an electron, both loss and gain of electrons, ionic bonding and that it shares electrons.
— Examiner report, February/March 2024, 0653/32 Q2(b) (Cambridge)
The majority of candidates were able to state at least one difference between the atom and the ion. When answering such questions, candidates are encouraged to state clearly which electronic structure they are referring to and avoid answers that start with ‘it’.
— Examiner report, October/November 2022, 0653/43 Q2(a) (Cambridge)
Stronger candidates gained full credit by writing about electron loss by the sodium atoms and electron gain by the chlorine atoms. Incorrect responses included descriptions of the two atoms sharing electrons to form a covalent bond.
— Examiner report, May/June 2022, 0653/33 Q5(c)(i) (Cambridge)
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