The size of colloids is :  1 point1 to 10000 nm10 to 100 nm1 to 1000 nm1 to 100 nm

In colloidal state, particle size ranges fromA) 1 to 10 ÅB) 20 to 50 ÅC) 10 to 100 Å D) 1 to 280 Å

What is the standard form for 1 nanometre?1 × 10-8 m0.1 × 10-8 m0.1 × 10-9 m1 × 10-9 m2What size are nanoparticles?100-1000 nmMore than 1000 nmLess than 1 nm1-100 nm3Why are only very small amounts of nanoparticles required in industry compared with other molecules?Because they are unreactiveBecause they have a very large surface area to volume ratioBecause they have a very small surface area to volume ratioBecause they are highly flammable4Why do some people have concerns about the use of nanoparticles in sunscreens?They are flammableThey may not be very effectiveThey may enter the bloodstream with unpredictable resultsThey are very expensive

What is the typical size range of nanoparticles?a) 1 to 100 millimetersb) 1 to 100 micrometersc) 1 to 100 nanometersd) 1 to 100 picometers

Colloids, also known as colloidal solutions or colloidal systems, are mixtures in which microscopically dispersed insoluble particles of one substance are suspended in another substance. The size of the suspended particles in a colloid can range from 1 to 1000 nanometres (10-9 metres). For a mixture to be classified as a colloid, its suspended particles must not settle (in the manner that the particles of suspensions settle at the bottom of the container if left undisturbed). Colloidal solutions are known to exhibit the Tyndall Effect, which is a phenomenon in which beams of light incident on colloids are scattered due to the interactions between the light and the colloidal particles.

Which one of the following is the correct approximate size for the radius of an atom?0.1 dm0.1 nm0.1 μm0.1 fm