S3.1 The periodic table: Classification of elements (SL)
15 revision questions with answers for S3.1 The periodic table: Classification of elements (SL). Read them here, or play the set as a class game on the projector. Free to host, and students join with a code.
Vertical columns of the periodic table?
- Periods
- Blocks
- Series
- GroupsRight answer
What this set covers
Periodic trends and properties at SL: atomic radius, first ionisation energy and electronegativity across and down groups, electron affinity, alkali metals and halogens, and the acid-base character of period 3 oxides.
- Common mix-up
- Students often explain radius across a period with shielding: it is the increasing nuclear charge acting on the same shell that pulls the outer electrons in.
- Revision tip
- Take one trend, say first ionisation energy down group 1, and write a two-line explanation using distance from the nucleus, then check it against the answers.
All 15 questions and answers
Vertical columns of the periodic table?
Answer: Groups
Region of the periodic table containing the transition elements?
Answer: d-block
Trend in atomic radius across period 3?
Answer: Decreases
Atomic radius falls across a period mainly because of increasing…?
Answer: Nuclear charge
Of these isoelectronic ions, which is the largest?
Answer: N³⁻
General trend in first ionisation energy across a period?
Answer: Increases
Down a group, first ionisation energy falls mainly because the outer electron is…?
Answer: Further from the nucleus
Most electronegative element?
Answer: Fluorine
Enthalpy change when one mole of gaseous atoms each gain one electron?
Answer: Electron affinity
Products of sodium reacting with water?
Answer: NaOH and H₂
Most reactive of these alkali metals with water?
Answer: Rubidium
Colour of aqueous potassium iodide after chlorine water is added?
Answer: Brown
Halogen that can displace neither chloride nor bromide ions from solution?
Answer: Iodine
Oxide that dissolves in water to form an acidic solution?
Answer: SO₃
Amphoteric period 3 oxide?
Answer: Al₂O₃
Play it as a class game
Play this set opens it in splycr, where you can host it for your class straight away. Hosting needs no account: put the room code on the projector, and students join from a phone with the code and their first name. Each question plays as multiple choice, and the three wrong options were written for that question.