MEDIUM
AS and A Level
IMPORTANT
Earn 100

Draw a labelled diagram to show the structure of a calcium atom.

Important Questions on Electrons in Atoms

EASY
AS and A Level
IMPORTANT
Practise writing units in standard form,e.g g/cm3becomes g cm-3(the negative 3 shows that the cm3 is the divisor).Try changing the following into the standard form: 
mol/dm3
EASY
AS and A Level
IMPORTANT
Practice writing units in standard form,e.g g/cm3becomes g cm-3(the negative 3 shows that the cm3 is the divisor). Try changing the following into the standard form: 
KJ/mol
MEDIUM
AS and A Level
IMPORTANT
Why must the specimens studied using an electron microscope have a dry surface ?
MEDIUM
AS and A Level
IMPORTANT
Why might it be useful to be able to look at a substance in more detail ?
EASY
AS and A Level
IMPORTANT
Write the simple electronic configuration of the following atom, showing the principal quantum number shells only.
Sulphur; The atomic number of sulphur, Z=16
EASY
AS and A Level
IMPORTANT
Write the simple electronic configuration of the following atom, showing the principal quantum number shells only.
Magnesium; The atomic number of Magnesium, Z=12
EASY
AS and A Level
IMPORTANT
Write the simple electronic configuration of the following atom, showing the principal quantum number shells only.
Fluorine; The atomic number of Fluorine, Z=9
EASY
AS and A Level
IMPORTANT
Write the simple electronic configuration of the following atom, showing the principal quantum number shells only.
Potassium; The atomic number of Potassium, Z=19