BRAINCAKEPredicting and identifying reactions
Revision notes for Predicting and identifying reactions in OCR Combined Science A (J250). Every lesson in BrainCake comes with R.E.C.I.P.E. recall steps, a quick check and spaced reviews.
- Properties of Groups 1, 7 and 0The elements in a group of the Periodic Table have similar properties.
- Outer electrons and trends in Groups 1, 7 and 0The group number tells you how many electrons are in the outer shell of an atom.
- Predicting reactions from the Periodic TableElements in the same group have the same number of outer electrons, so they react in similar ways.
- Reactivity of metals with water and acidsWhen a metal reacts, its atoms lose electrons to form positive ions, for example Na → Na+ + e-.
- Order of reactivity of metalsA metal's place in the reactivity order can be worked out from experiments.