1.7 Ions, atoms and isotopes
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Ion def
A charged particle produced by the loss or gain of electrons
What is an example of when atoms lose or gain electrons
When metals react with non metals
How many atoms does a person have in their body
7x10^27
Isotopes def
Atoms that have the same number of protons but different number of neutrons (ie they have the same atomic number but different mass numbers)
What happens sometimes if you add extra neutrons in an atom
It makes the nucleus unstable so it’s radioactive
Samples of different isotopes of an element have different what
Physical properties (ie different density or radioactivity)
Do isotopes of an element always have the same chemical properties
Yes because the electronic structure is the same