The mass of one atom would best be measured in this unit:
oa) amu
ob) gram
oc) milligram
od) microgram

mass of one atom is measured in the unit of 1 amu

Explanation:

As we know that the mass of one atom is very small and it is of order of

here we know that 1 amu is defined as 1/12 part of mass of 1 atom of C-12 isotope

so here we will have

so here we can say that mass of one atom is measured in the unit of 1 amu

80cm/s.

24cm/s.

53.3cm/s.