Question

Which two reasons prompted the scientists to choose oxygen as a reference initially? What is meant by the fact that the atomic mass of nitrogen is 14

Answer 1

What please can you write the question properly?

Answer 2

Answer :

• the oxygen is used by scientist to use or to do experiments on any explosive things like that
• it the air we breath so it is very help full to us

• the atomic mass of nitrogen is 14 it is a fact

    Hope helped  <3