CAIE A Level Chemistry 9701 · The Periodic Table: chemical periodicity

The Periodic Table: chemical periodicity: describe question

Describe7 marksChallenge

Element X is a member of Group 15 of the Periodic Table with atomic number 115. Using your knowledge of chemical periodicity, describe the following expected properties of element X:

(a) its physical state at room temperature and pressure (b) the formula and type of bonding in its oxide (c) the acid-base character of its oxide (d) the formula and type of bonding in its chloride (e) its reaction, if any, with cold water (f) the oxidation state(s) it exhibits in its oxide and chloride (g) its first ionization energy relative to that of nitrogen and bismuth

How this question is marked

7 marks, so the mark scheme is looking for about 7 separate creditworthy points. Making the same point twice in different words earns it once.

Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.

More The Periodic Table: chemical periodicity questions

All The Periodic Table: chemical periodicity questions

Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.