Question

Which of the following is smallest unit? (A) millimeter (B) angstrom (C) Fermi (D) meter

Answer 1

(B) angstrom

It's also used to measure the diameter of world's smallest unit, particles of matter.

Particles of matter are defined as smallest unit existing in this Universe.

They are measured in different quantities but always measured in this unit, angstrom.

Answer 2

Answer:

 Correct option is

C

fermi

Explanation:

 

Metre is the SI unit of length.

1 millimetre=10 ^-3 meter

1 angstrom=10^−10 mete

 1 fermi=10^−15  meter  

 So, fermi is the smallest unit.