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Transcript of Atomic Structure
Atoms contain a central nucleus that contains the heavier NEUTRONS and PROTONS.
Circling the nucleus are almost weightless particles called ELECTRONS.
Electrons have a negative charge (-)
Oxygen has EIGHT electrons - Eight negative electrons combined with the eight positive protons gives the oxygen atom no charge - neutral.
Have a positive charge (+).
Found in the nucleus of an atom.
Oxygen has EIGHT protons - this is why it's ATOMIC NUMBER is EIGHT.
Also found in the nucleus.
They have no charge - are neutral.
The number can vary by atom.
The ATOMIC NUMBER:
The number of PROTONS
And in a neutral atom,
the number of ELECTRONS.
So - one atom of Titanium,
element number 22 has:
22 PROTONS & 22 ELECTRONS
Titanium has an atomic weight of 47.867.
For this lesson we will round this up to 48.
This is the weight of the nucleus:
The NEUTRONS + PROTONS.
ATOMIC WEIGHT - what it can tell us.
ATOMIC WEIGHT = PROTONS + NEUTRONS
We can rearrange this equation to calculate the number of NEUTRONS in an atom of Titanium.
(Titanium-48: Atomic weight of 48 and 22 protons)
NEUTRONS = ATOMIC WEIGHT - PROTONS, or
Neutrons = 48 - 22
Titanium-48 has 26 NEUTRONS.