Barium is an element. It is solid at room temperature.
Solid barium cannot be compressed.
Why?
Solid barium cannot flow, but liquid barium can flow.
Explain why in terms of particles.
Barium gas completely fills any container it is put in.
Explain why in terms of particles.
Barium reacts with water. Barium hydroxide, Ba(OH)2\text{Ba(OH)}_2Ba(OH)2, and hydrogen, H2\text{H}_2H2, are made.
Write a balanced symbol equation for this reaction.
Barium nitrate has the formula Ba(NO3)2\text{Ba(NO}_3)_2Ba(NO3)2.
Calculate the relative formula mass of barium nitrate. (Use relative atomic masses: Ar(Ba)=137.3A_r(\text{Ba}) = 137.3Ar(Ba)=137.3, Ar(N)=14.0A_r(\text{N}) = 14.0Ar(N)=14.0, Ar(O)=16.0A_r(\text{O}) = 16.0Ar(O)=16.0)
27 exam-style questions on OCR GCSE Chemistry The particle model. Each one has a worked solution and a mark scheme showing where the marks go.