Question

the periods on the periodic table determine what energy level the outermost electrons are in. 11. in which energy level are the outermost electrons of iodine? (ie, n = 1, n = 2, n = 3? draw the bohr model if you arent sure) 12. where are the metals located on the periodic table? 13. where are the nonmetals? 14. which group of elements is least reactive? why are they unreactive?

Explanation:

Step1: Locate iodine on periodic table

Iodine (I) is in period 5.

Step2: Determine energy - level of outermost electrons

The period number corresponds to the principal energy - level of the outermost electrons. So for iodine, the outermost electrons are in the $n = 5$ energy level.

For question 12:
Metals are located on the left - hand side and in the middle of the periodic table. This includes the alkali metals (Group 1), alkaline earth metals (Group 2), transition metals (Groups 3 - 12), and some of the post - transition metals.

For question 13:
Nonmetals are located on the right - hand side of the periodic table. This includes the halogens (Group 17), noble gases (Group 18), and other nonmetals such as hydrogen, carbon, nitrogen, oxygen, phosphorus, sulfur, and selenium.

For question 14:
The noble gases (Group 18) are the least reactive group of elements. They are unreactive because they have a full outer electron shell (8 electrons, except for helium which has 2). This gives them a stable electron configuration and they have little tendency to gain, lose, or share electrons.

Answer:

1. The outermost electrons of iodine are in the $n = 5$ energy level.
2. Metals are located on the left - hand side and in the middle of the periodic table.
3. Nonmetals are located on the right - hand side of the periodic table.
4. The noble gases (Group 18) are the least reactive group of elements because they have a full outer electron shell.