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Unit 1 assignment 1


Structure, Bonding and the Periodic Table


Atomic Structure

Subatomic particle Location Mass Charge

Protons Nucleus 1 +1

Electrons Outer shell 1/1840 -1

Neutrons Nucleus 1 0




The atomic number is the number of protons which is equal
to the amount of electrons.
The atomic mass number is the number of protons and
neutrons.




Each element has a different number of subatomic particles. For example;

● Helium

, Unit 1 assignment 1


● Calcium




● Fluorine




● Sodium




● Carbon