'Nano-' denotes a fraction of one billionth (10-9)
A nanogram (ng) is, therefore, 10-9gor one billionth of a gram. This can be written as a unit in the 9th decimal place: 0.000000001g.
Similarly:
10-6g = 1 microgram (µg)
...
10-12g = 1 picogram (pg)
10-15g = 1 femtogram (fg)
and so on.
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There are 1,000,000 micrograms in a gram. There are 1,000,000,000 nanograms in a gram. Therefore there are 1000 nanograms in a microgram, and as such, a microgram is 1000 times larger than a nanogram.
nanogram
50000 nanograms
No, it's 10 to the minus nine
This involves a multiplication of 1000. This is because a microgram is 1/1,000,000 of a gram and a nanogram is 1/1,000,000,000 of a gram. Therefore there are 1000 nanograms in a microgram.