Question

Astatine is below iodine in Group VII in the periodic table. Which row describes the properties of astatine?
a.) State at room temperature- gas, reactivity- displaces chlorine, bromine and iodine.
b.) State at room temperature- gas, - displaces iodine but does not displace chlorine or bromine.
c.) State at room temperature- solid, displaces iodine but does not displace chlorine or bromine.
d.) State at room temperature- gas, reactivity- does not displace chlorine, bromine or iodine.

Answer 1

Hint: In order to deal with this question we will first give a brief introduction of the element astatine its properties and then we will see the given options and compare to choose the right option.
Astatine is highly radioactive and can only be found in small amounts. Its properties are inferred from its position in the periodic table and are studied in extremely dilute solutions by its chemistry.

Complete answer:
In general, room temperature is taken as 25 ° C. At this temperature, gases are fluorine and chlorine, bromine is a liquid, and solids are iodine and astatine. Therefore there is a trend in the state from gas to liquid to solid as you descend the group.
Therefore, Astatine is solid at room temperature so other options are excluded and iodine is more reactive than astatine so iodine cannot be displaced.

Hence, the correct option is D.

Note: Like the other halogens, astatine with metals like sodium would be expected to form salts. Astatine can also react with hydrogen to form astatide of hydrogen which forms hydrostatic acid when dissolved in water. Astatine is the halogens' least chemically reactive, and exhibits the halogen group's most metallic properties.