Connect with us


What is Atto?

Atto denotes a unit one-quintillionth (10−18) the size of the unit named by the stem.

Atto (a) is a unit prefix denoting a variable of 10−18 or 0.0000000000000001 in the metric system. The unit multiple was introduced in Resolution 8 at the 12th General Weights and Measures Meeting. It comes from the Danish word atten which means eighteen.


  • Weight of the HIV-1 virus is about 1×10−18 kg which can be written as 1000 ag.
Continue Reading

Question is the Mother of Knowledge. We are committed to give you every question, term, definition, latest news, current affairs related to Physics, Chemistry, Space, Life Science, Geography, Technology, History, Sports, Politics, Economics, etc. in most simplest and easiest way.

Click to comment

Leave a Reply

Your email address will not be published.

More in Physics

To Top