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16 Cards in this Set
- Front
- Back
- 3rd side (hint)
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Density |
Density is how much mass a material has for a given volume
Density is a way to measure how tightly packed an object is (how solid something is).
The densities of solids and liquids are commonly expressed in either g/cm3 ( grams per cubic centimeter) or g/ml ( grams per milliliter) |
Density= Mass/ volume |
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Cathode Ray Tube |
-A stream of electrons observed in vacuum tubes - Their presence is detected because they cause certain materials to give off light - Radiation is produced between the electrodes once a high voltage was applied to the electrodes in the tube - The cathode ray ( radiation) originates at the negative electrode and travels to the positive electrode in the tube. |
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Nucleus |
Rutherford experiment resulted in the conclusion that most of the volume of an atom is mostly empty space in which electrons move around the Nucleus
Nucleus: A very small and extremely dense region inside the nucleus |
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Isotope |
Atoms with identical atomic numbers but different mass numbers (same number of protons but different number of neutrons) are called isotopes of one another |
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Chemical Formula |
Molecular formulas = Chemical formulas that indicate the actual number of atom in a formula Ex: Hydrogen peroxide chemical formula: H2O2 |
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Empirical Formulas |
-Chemical formulas that give only the proportional (1:2) number of atoms of each type of molecule. - The subscripts in an empirical formula are always the smallest possible whole number ratios
Ex. Ethylene Molecular: C2H4 Empirical: CH2
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Ion |
If electrons are removed from or added to an atom, a charged particle called an Ion is formed. |
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Cation |
An Ion with a Positive charge |
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Anion |
An Ion with a negative charge |
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Isotope |
Atoms with identical atomic numbers but different mass numbers (same number of protons but different number of neutrons) are called isotopes of one another |
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Chemical Formula |
Molecular formulas = Chemical formulas that indicate the actual number of atom in a formula Ex: Hydrogen peroxide chemical formula: H2O2 |
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Empirical Formulas |
-Chemical formulas that give only the proportional (1:2) number of atoms of each type of molecule. - The subscripts in an empirical formula are always the smallest possible whole number ratios
Ex. Ethylene Molecular: C2H4 Empirical: CH2
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Ion |
If electrons are removed from or added to an atom, a charged particle called an Ion is formed. |
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Cation |
An Ion with a Positive charge |
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Anion |
An Ion with a negative charge |
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Polytomic Ion |
Ions that consists of atoms joined in as a molecule, but they have a net postive or negative charge
Ex: Hydroxide OH^ – |
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