Nano Scle and nano chemistry chemistry

• none

• one dimension

• two dimensions

• three dimensions

• not a Nano material

GR: Nano substances have adverse health effects

• Because their tiny sizes make them able to attach to air, so they can penetrate the cells of living organisms

• Because their large sizes make them able to attach to air, so they can penetrate the cells of living organisms

• Because their tiny sizes make them unable to attach to air, so they can't penetrate the cells of living organisms

• none

they are good conductors of heat and electricity, they can be used as biological sensors

• nano shell

• Nanowires

• carbon nanotubes

• none

they can be used for carrying medicine inside human body (which decreases side effects)

• carbon nanotubes

• Bucky balls

• Nanowires

• thin films

GR:- The extraordinary properties of nanomaterials

• Due to the increase of the ratio between the surface area and weight and the no. of atoms on the surface.

• Due to the increase of the ratio between the density and volume and the no. of atoms on the surface.

• Due to the decrease of the ratio between the surface area and volume and the no. of atoms on the surface.

• Due to the increase of the ratio between the surface area and volume and the no. of atoms on the surface.

A unit which equals one billionth meter

• giga meter

• micrometer

• Nanometer

• megameter

The behavior of nanoparticles are linked with their tiny sizes because:-

• The ratio between surface area and volume is very great if compared to bigger sizes

• The ratio between surface area and volume is smaller if compared to smaller sizes

• The no. of atoms on the particles surface is much greater

• none

nanotechnology is important because:-

• It needs special devices to deal with it

• Its value ranges from 1 to 100 nm special properties

• It has special properties

• Nanomaterials industry require