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14 Cards in this Set
- Front
- Back
- 3rd side (hint)
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- All atoms are made up of tiny, indivisible particles called atom - Atoms of the same elements have similar properties. Atoms with different elements have different properties - Atoms of different elements can combine to form a compound - In a chemical reaction, atoms rearrange themselves to form nee compounds, but new element is not being formed |
Dalton's Atomic Theory |
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- Any king of matter can be subdivided into smaller particles.- All kinds of matter are made up of tiny, indivisible particles, either solid, liquid, or gas. |
Democritus (Great Pholisopher) |
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In the formation of a compound, atoms combine small whole number ratios |
Law of definite proportion (by mass) |
Law |
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- It states that in any given system that is closed to the transfer of matter (in and out), the amount of matter in the system stays constant. - A concise way of expressing this law is to say that the amount of matter in a system is conserved |
Law of conservation of matter |
Law |
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The Sub-Atomic particles |
Electron Proton Neutron |
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We cannot predict the exact location of an electron at a given period but we can talk off the probability of finding the electron around the nucleus of an atom |
Heisenberg uncertainty principle |
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The volume is a space around the nucleus of an atom where we can probably find the electron |
Atomic Orbital or Electron Cloud |
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It refers to the energy of an election - it discuss the size of an atom - it designates the energy level |
Principal quantum number N |
Quantum number |
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It refers to the shape of an atomic orbital - it designates the sublevel |
Azimuthal or subsidiary quantum number, L |
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Refers to the orientation of the atomic orbitals |
Magnetic quantum number, M |
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- Each orbital can contain a maximum of two electrons spinning in opposite directions - In an orbital note you and directions can have the same set of quantum numbers |
Pauli's Exclusion Principle |
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Lack of the degenerating orbitals must contain one electron each before they have paired |
Hund's rule of multiplicity |
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In the distribution of electrons in the different orbitals, electrons tend to occupy orbitals of lower energy first |
Aufbau principle |
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- Are atoms have the same element which has the same atomic number but different in mass number (different number of neutrons) |
Isotopes |
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