Atomic Structure

Gap-fill exercise

Fill in all the gaps, then press "Check" to check your answers. Use the "Hint" button to get a free letter if an answer is giving you trouble. You can also click on the "[?]" button to get a clue. Note that you will lose points if you ask for hints or clues!

The atom is made of particles called -atomic particles
These are called , and
The atomic number is the number of
The relative atomic mass is the sum of the and the
The relative charge of an electron is
The relative charge of a neutron is
The relative charge of a proton is
The first element of the periodic table is called
The structure of the atom that scienctists draw is named after a famous scientist called