Question

how we identify the metal and non metal ???

​

Answer 1

Elements to the left of the line are considered metals. Elements just to the right of the line exhibit properties of both metals and nonmetals and are termed metalloids or semimetals. Elements to the far right of the periodic table are nonmetals.

Answer 2

Answer:

Metal Physical Properties:

Lustrous (shiny)

Good conductors of heat and electricity

High melting point

High density (heavy for their size)

Malleable (can be hammered)

Ductile (can be drawn into wires)

Usually solid at room temperature (an exception is mercury)

Opaque as a thin sheet (can't see through metals)

Metals are sonorous or make a bell-like sound when struck

Metal Chemical Properties:Have 1-3 electrons in the outer shell of each metal atom and lose electrons readily

Corrode easily (e.g., damaged by oxidation such as tarnish or rust)

Lose electrons easily

Form oxides that are basic

Fave lower electronegativities

Are good reducing agents

Nonmetal Physical Properties:

Not lustrous (dull appearance)

Poor conductors of heat and electricity

Nonductile solids

Brittle solids

May be solids, liquids or gases at room temperature

Transparent as a thin sheet

Nonmetals are not sonorous

Nonmetal Chemical Properties:

Usually have 4-8 electrons in their outer shell

Readily gain or share valence electrons

Form oxides that are acidic

Have higher electronegativities

Are good oxidizing agents