Because protons are positive and electrons are negative so they cancel each other out, and neutrons are neutral therefore neutrons don't make a difference in the atom.
2 of 5
How do you work out how many neutrons there are in an atom?
You take the mass number and take away the atomic number from it.
3 of 5
What is the atomic number of an atom?
The number of protons it contains.
4 of 5
What is special about the electronic structure of argon and neon?
They both have a full outer shell, meaning that they are not reactive.
5 of 5
Other cards in this set
Card 2
Front
Atoms are always neutral, explain why?
Back
Because protons are positive and electrons are negative so they cancel each other out, and neutrons are neutral therefore neutrons don't make a difference in the atom.
Card 3
Front
How do you work out how many neutrons there are in an atom?
Back
Card 4
Front
What is the atomic number of an atom?
Back
Card 5
Front
What is special about the electronic structure of argon and neon?
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