Question

an element on the periodic table is in group 17 and period 4. which of the following is true based on the placement of the element?
o the element is iodine (i).
o the element is a metal.
o the element would have 4 valence electrons.
o the element has 4 energy levels and is in the p - block.

Explanation:

Elements in Group 17 are halogens. Iodine is in Group 17 but not in Period 4 (iodine is in Period 5). Elements in Group 17 are non - metals. For an element in Period 4 and Group 17, it has 4 energy levels (since the period number indicates the number of energy levels) and is in the p - block (Group 13 - 18 are in the p - block). The number of valence electrons for elements in Group 17 is 7, not 4.

Answer:

The element has 4 energy levels and is in the p - block.