Problem: Of the well-characterized elements of group 7A, which would exhibit the following properties?It reacts with the alkali metals (M) to form a salt MX, where X is the halogen.Its hydrogen halide, HX, forms a weakly acidic solution.It is more reactive than the other halogens.It forms interhalogen compounds only of the form XA, where A is the unknown and X is another halogen.A) fluorineB) chlorineC) bromineD) iodineThe main group elements of the periodic table are those found in groups 1A through 8A. The members of a group exhibit similar properties owing to the similarity in their outer electron configurations. Although the properties are similar, they are not identical, and they vary from top to bottom of a column. As a result, each element has a unique set of properties that can be used to identify it.

FREE Expert Solution
82% (46 ratings)
Problem Details

Of the well-characterized elements of group 7A, which would exhibit the following properties?

  • It reacts with the alkali metals (M) to form a salt MX, where X is the halogen.
  • Its hydrogen halide, HX, forms a weakly acidic solution.
  • It is more reactive than the other halogens.
  • It forms interhalogen compounds only of the form XA, where A is the unknown and X is another halogen.


A) fluorine
B) chlorine
C) bromine
D) iodine


The main group elements of the periodic table are those found in groups 1A through 8A. The members of a group exhibit similar properties owing to the similarity in their outer electron configurations. Although the properties are similar, they are not identical, and they vary from top to bottom of a column. As a result, each element has a unique set of properties that can be used to identify it.

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Periodic Table concept. You can view video lessons to learn Periodic Table. Or if you need more Periodic Table practice, you can also practice Periodic Table practice problems.