D: OH⁻
Oracle Prep sorts past-paper questions by topic, so you can drill Atomic structure and see which topics are most likely to come up next.
Sign up free →Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content
In which species are the numbers of protons, neutrons and electrons all different?
Use of the Data Booklet is relevant to this question. In which pairs do both species have the same number of unpaired…
Use of the Data Booklet is relevant to this question. In which option do all three particles have the same electronic…
In this experiment you will determine the enthalpy change, ΔH, for the reaction between aqueous copper(II) sulfate an…
Iron is a transition metal in Group 8 of the Periodic Table.
Sea water contains about 20gdm-³ of chloride ions, Cl-(aq). The exact concentration of Cl-(aq) in sea water can be de…