GCSE Edexcel Chemistry Halogen displacement reactions: Complete the following sentences

Question

Complete the following sentences.

(i) The name given to group 7 in the periodic table is ______________.

(ii) The name given to group 0 in the periodic table is ______________.

(b) Which of the following rows gives the colours of the group 7 elements chlorine and bromine at room temperature?

chrolorine      bromine
A   red-brown      purple
B   yellow-green   grey
C   yellow-green   red-brown
D   grey           red-brown

(c) Figure 2 shows the melting and boiling points of bromine and iodine.

Using the information in Figure 2, which row shows the physical states of these elements at 50°C?

bromine      iodine
A   liquid        gas
B   solid         liquid
C   gas           solid
D   liquid        solid

(d) The densities of some elements in group 0 are shown in Figure 3.

Use the information in Figure 3 to suggest the density of krypton.

density of krypton = ______________ g/cm³

(e) For many years, argon was used to fill filament light bulbs.
A filament light bulb is shown in Figure 4.

When the bulb is in use the metal filament becomes extremely hot.
Explain why argon, rather than air, was used to fill light bulbs.

Complete the following sentences - Edexcel - GCSE Chemistry - Question 2 - 2019 - Paper 1