Identify each of the following elements as a metal, a...

Identify each of the following elements as a metal, a nonmetal, or a metalloid:
a. located in Group $2 \mathrm{A}(2)$
b. a good conductor of electricity
c. chlorine
d. arsenic
e. an element that is not shiny
f. oxygen
g. nitrogen
h. tin

Key Concepts

Metal

Metals are elements that are typically characterized by their shiny appearance, high electrical and thermal conductivity, malleability, and ductility. They tend to lose electrons in chemical reactions and are predominantly found on the left side and in the center of the periodic table.

Nonmetal

Nonmetals are elements that usually lack lustrous appearance and are poor conductors of heat and electricity. They tend to gain electrons during chemical reactions and can be found in various physical states (solid, liquid, gas) at room temperature, mostly located on the right side of the periodic table.

Metalloid

Metalloids exhibit properties intermediate between those of metals and nonmetals. They often display some degree of conductivity and may have a semi-metallic lustre, making them useful in semiconductor technologies.

Periodic Table Classification

The periodic table organizes elements into groups and periods based on their atomic structure and recurring chemical properties. Group classifications, such as the one labeled Group 2A, indicate predictable behaviors and characteristics that help in determining whether an element is a metal, nonmetal, or metalloid.

Physical Properties Analysis

The categorization of elements into metals, nonmetals, or metalloids relies on analyzing their physical properties, such as electrical conductivity, luster, and structural characteristics like malleability. These observable traits provide insight into the underlying atomic structure and guide the classification process.