Tricky questions

Question 1

In a mass spectrometer, the relative abundance of each isotope is proportional to the current generated by that isotope at the detector.Explain how this current is generated.

Answer 1

Electron(s) transferred / flow (at the detector) (From detector / plate) to the (+) ion

Question 2

State the meaning of the term structural isomers.

Answer 2

(Compounds with the) same molecular formulaBut different structural formula / different displayed formula/different structures / different skeletal formula

Question 3

Aluminium and thallium are elements in Group 3 of the Periodic Table. Both elements form compounds and ions containing chlorine and bromine.Write an equation for the formation of aluminium chloride from its elements.

Answer 3

Al + 1.5Cl2 ——-> AlCl3

Question 4

Titanium can be hammered into objects with different shapes that have similar strengths.1. Suggest why titanium can be hammered into different shapes.2. Suggest why these objects with different shapes have similar strengths

Answer 4

1. Layers of atoms/ions slide (over one another) (not just layers)(2. Strong) (metallic) bonding re-formed i.e. they have thesame (metallic) bonding and retains same (crystal) structure or same bond strength i.e they have the same attraction between protons and delocalised electrons as before being hammered