1s22s22p63s23p64s23d104p6. this ion is a(n) . what is the chemical symbol of the noble gas this ion is isoelectronic with?

Isoelectronic species are species with same number of electrons.

The given electronic configuration of the ion is as follows:

Check for the total number of electrons in the ion. The sum of number of electrons in all shells according to given electronic configuration is 36. Number of electrons in a neutral atom is equal its atomic number. According to periodic table, atomic number of krypton is 36, which is a noble gas and belongs to 18th group with electronic symbol Kr. It has the same electronic configuration thus, it is isoelectronic with the ion.

Therefore, the chemical symbol for noble gas isoelectronic with the given ion is Kr.

ca has a crystalline lattice with positive ions (since it is a metal, metals are positively charged) and electrons flow freely in its structure since the ca atoms have a large nuclear radius so the electrons are not tightly held, therefore the electrons can flow freely since they are not being highly attracted by the nucleus. moreover, one of the properties of metals are that they are conductors of electricity, thus proving ca is the element.