Unit 1: Metals, Nonmetals, and Metalloids

Periodic Table

118 elements

Physical Property

A characteristic that can be observed or measured without changing the substance

Metals

Largest element group; they are typically solid, shiny, malleable, and good conductors of heat and electricity.

Nonmetals

Elements that are dull, not malleable, and poor conductors of heat and electricity; usually gases or brittle solids.

Metalloids

Elements that have properties of both metals and nonmetals; semiconductors.

Luster

Surfaces reflects light, shiny

Conductivity

ability or power to easily transfer heat, electricity, or sound.

Malleability

Ability to be shaped or formed into thin sheets by hammering or pressure.

Brittle

Tendency to break, snap, or crack Easily

Insulator

A substance that resists (stops) electric current, or a material that resists (stops) the flow of heat.

Conductor

A substance that allows the flow of electric charge or transfers thermal (heat) energy through matter.

EX of Semiconductor

Silicon

Element

A pure substance composed of the same type of atom

Dull

does not reflect light

Ductile

ability of metals to be drawn into wires

EX of nonmetal

Chlorine

Ex of metal

Aluminum

Location of Metals

left side of periodic table

Location of metalloids

staircase/zig zag

Location of nonmetals

right side of periodic table