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More about the atomic number
Each element in the Periodic Table has its own atomic number.
The atomic number is important
it gives the number of protons in an atom of an element.
Since atoms are neutral and the charge on an electron is equal and opposite to the charge
on a proton, the atomic number also gives the number of electrons in an atom.
An element can be defined as a collection of atoms all with the same atomic number or the
same number of protons.
What information is given by the atomic number of an element?
REFER TO A PERIODIC TABLE.
Complete the following table.
Element
Atomic number
Number of protons
Number of electrons
carbon
hydrogen
magnesium
7
20
11
Chemical Changes and Structure
Atomic structure 2