GCSE|AQA| Chemistry P1F (Nov 2020)

What is the state of bromine at 100°C?

Use Table 1.

• Gas

• Liquid

• Solid

What temperature does chlorine gas condense at to form liquid?

Use table 1.

Complete the sentences.

Going down Group 7 the melting points________

This is because the size of the molecules increases so the

intermolecular forces_________

A teacher investigated the reaction of iron with chlorine.

Apparatus used shown in figure 1.

Why did teacher do the investigation in fume cupboard?

• Chlorine gas is coloured

• Chlorine gas is toxic

• Chlorine gas is flammable

Balance the equation for the reaction between iron and bromine.

2Fe + _____ Br2 → 2FeBr3

Calculate the relative formula mass (Mr) of FeBr3

Relative atomic masses (Ar): Fe = 56 Br = 80

This question is about models of the atom.

Atoms were first thought to be tiny spheres that could not be divided.

Which particle was discovered to change the model of the atom?

• Electron

• Neutron

• Proton

What is the name of this model of the atom?