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Elements are made of atoms.
All atoms of an element are identical.
Each element is unique.
All elements can form compounds.
Elements are not created or destroyed. |
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| Made up of 2 or more atoms which the same ratio. |
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| Found out about electrons. Cathode Ray experiment. |
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| Found out about proton and nucleus. Gold Foil experiment. |
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| When the number of neutrons of an atom changes. |
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| Positive subatomic particle. |
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| Negative subatomic particles. |
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| Neutral subatomic particles. |
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| Particles with significant mass. |
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| Mendeleev's Periodic Table |
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| Organized by increasing mass. |
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| Shiny, heat, electricity, malleable, ductile, solid at room temperature. |
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| Dull, no heat, no electricity, not malleable, not ductile, not solid at room temperature. |
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| Mixture of metals and non-metals. |
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| Hydrogen, Nitrogen, Oxygen, Fluorine, Chlorine, Iodine, Bromine |
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| When an atom gains or loses electrons. |
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| 2 elements in a compound. |
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| 2 non-metals sharing electrons. |
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| Covalently bonded compounds acting as ions. |
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| Produce H+ ions in water. |
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| Produce OH- ions in water. |
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| Accuracy is limited by instrument, so you write all known digits with an estimate for accuracy. |
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| A measure of kinetic energy. |
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| A quantity which is the same for every sample of a compound. |
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| Celsius, Kelvin, and Fahrenheit. |
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