High School

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------------------------------------------------ The element in Period 4 and Group 1 of the Periodic Table would be classified as a

A. metal
B. metalloid
C. nonmetal
D. noble gas

Answer :

Option A. Metal

Starting from K- Potassium up to As-Arsenic are all metals, the three elements are special: Se-Selenium(Non-Metals),Br-Bromine(Halogens),Kr-Noble gas still part of the row but not classified as metal.

Final answer:

The element in Period 4 and Group 1 of the Periodic Table is classified as a metal, specifically, the alkali metal Potassium (K). So the correct option is A.

Explanation:

The element in Period 4 and Group 1 of the Periodic Table would be classified as a metal. Group 1 elements, also known as the alkali metals, are characterized by their shiny appearance, high reactivity, and they are all good conductors of electricity. Period 4 in the Periodic Table includes the element Potassium (K), which is indeed a metal and also classified as a main-group (representative) element, due to its location within the s-block of the Periodic Table. These metals are found in the leftmost part of the Periodic Table and are distinct from transition metals and metalloids.