Atoms, Compounds and Isotopes

Atoms, Compounds and Isotopes

1. Different atomic forms of the same element,which have the SAME number of protons but a DIFFERENT number of NEUTRONS.

   • If they had different atomic numbers, they'd be different elements all together!

2. CONTAIN 3 SMALL PARTICLES: Protons, Neutrons & Electrons!

   • To get the number of NEUTRONS... Subtract the ATOMIC number from the MASS number. Electrons aren't counted in the mass number because their relative mass is very small!

3. Atomic Number & Mass Number Describe an atom. They tell you how many of each kind of particle there is.

   • • Atoms of the same element all have the same number of protons - So atoms of different elements will have different numbers of protons.

4. Compounds are CHEMICALLY BONDED!!

   • Compounds are formed when ATOMS of 2 OR MORE elements are CHEMICALLY COMBINED together.
     • E.G. CO2 is a COMPOUND formed from a CHEMICAL REACTION between carbon and oxygen.
       • It is difficult to SEPARATE the 2 original elements out again.

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