How many moles are in 7.777x 1024 molecules of Mg2. Watch your significant figures 12.91 moles Mg2

12.9 moles Mg2

12 atoms Mg2

12.9 atoms Mg2

If a hydrogen atom is neutral, it must also have  one electron. an oxygen atom (o) has an atomic number of eight (8). this means a neutral oxygen atom has eight protons and eight electrons. the element actium (ac) has an atomic number of 89, so it has 89 protons and 89 electrons in a neutral atom

The correct answer is "hydrogen".

There is no reason to think the results are biased or not conducted properly but you should not assume the results are correct just because they were done in a laboratory so the answer would be c. it is likely to be reliable because the results support the conclusion presented.