Question

fill out the chart please
Element
Matching
Element Matching Group
or Period? Shared
Characteristics
Calcium (Ca)

Flourine (F)
Iodine (I)
Argon (Ar)

Answer 1

Element Matching Group or Period Shared Characteristics
Calcium (Ca) Group 2 Alkaline earth metal, reactive with water
Fluorine (F) Group 17 Halogen, highly reactive
Iodine (I) Group 17 Halogen, purple vapor, reacts with starch
Argon (Ar) Period 3 Noble gas, colorless, odorless, non-reactive