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Mass/Atomic noms

Chemistry

QuestionAnswer
The Mass number = The number of protons PLUS neutrons in the nucleus.
The Atomic number = The number of protons in the nucleus.
To work out the number of neutrons, you do: The Mass number - the Atomic number.
What does the group number represent? The number of electrons in the atoms outer shell.
What does the period number represent? The number of shells the atom has.
What do Noble gases (group 0) have in their outer shell? A full outer shell of electrons.
Elements react with each other in order to achieve what? A full outer shell of electrons.
Created by: eloiseis