Question

Question:Identify each of the following elements.
a. a member of the same family as oxygen whose most stable ion contains 54 electrons
b. a member of the alkali metal family whose most stable ion contains 36 electrons
c. a noble gas with 18 protons in the nucleus
d. a halogen with 85 protons and 85 electrons

Short answer

Answer

The element of each section has been found.

Step-by-step solution

Element for a member of the same family as oxygen whose most stable ion contains 54 electrons

Tellurium contains 52 electrons which accepts 2 electrons for Te^2- and makes 54 electrons. This represents stable configuration of electrons for Xenon.

Element for a member of the alkali metal family whose most stable ion contains 36 electrons

Rubidium contains 37 electrons. The most stable element with 36 electrons is Krypton. Rubidium will lose electron of 1 to form Rb⁺ ion.

Element for a noble gas with 18 protons in the nucleus

Argonwith 18 protons and electrons in the nucleus.

Element for a halogen with 85 protons and 85 electrons

The halogen with 85 protons and electrons isAstatine.