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Mass/Atomic noms
Chemistry
Question | Answer |
---|---|
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. |