How was it proved that electrons were
Which element was choosen for Rutherford’s experiment?
How was it proved that protons were positively
How was it proved that neutrons
How is mass number calculated?
Why is an atom always neutral?
What are isotopes? Give examples.
Calculate the relative atomic mass of Boron if in a sample of boron, 20% of the atoms are 10Br
and 80% are 11Br.If there
are 100 atoms, then 20 atoms would be 10Br and 80 atoms would be 11Br.