Atoms, Compounds and Isotopes

Contains 3 smaller types of particle
1. Protons
2. Neutrons
3. Electons
Atomic number and Mass number
1. Atomic Number
  1. Number of protons
  2. Atoms from the same element have the same number of protons
2. The Mass Number
  1. Total number of protons and neutrons
3. To get the number of neutrons just subtract the atomic number from the mass number.
Compounds are chemically bonded
1. Compounds are formed when atoms of two or more elements are chemically combined together
  1. E.g. Carbon dioxide is a compound formed by a chemical reaction between carbon and oxygen
2. /its difficult to separate the 2 original elements out again
Isotopes are the same except for an extra Neutron or Two
1. Isotopes are different atomic forms of the same element which have the SAME number of PROTONS but a DIFFERENT number of NEUTRONS
  1. Carbon 12 and Carbon 14 are examples
2. Isotopes must have the same atomic forms of the same element atomic number but different mass numbers
3. If they had different atomic numbers they would be be different elements altogether

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