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Which of the following is the smallest chemical unit that retains the properties of a pure substance?
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- 1. Intro to General Chemistry4h 5m
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- Naming Alkanes4m
- The Alkyl Groups9m
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- 23. Chemistry of the Nonmetals2h 39m
- Main Group Elements: Bonding Types4m
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- Nitrogen Family Reactions12m
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- Oxide Reactions4m
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- Noble Gas Compounds3m
- 24. Transition Metals and Coordination Compounds3h 19m
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- Electron Configurations of Transition Metals7m
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- Paramagnetism and Diamagnetism10m
- Ligands10m
- Complex Ions5m
- Coordination Complexes7m
- Classification of Ligands11m
- Coordination Numbers & Geometry9m
- Naming Coordination Compounds22m
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- Isomerism in Coordination Complexes17m
- Orientations of D Orbitals4m
- Intro to Crystal Field Theory10m
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- Crystal Field Theory Summary8m
- Magnetic Properties of Complex Ions9m
- Strong-Field vs Weak-Field Ligands6m
- Magnetic Properties of Complex Ions: Octahedral Complexes11m
2. Atoms & Elements
The Atom
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If an atom has 17 protons, which element is it?
A
Potassium
B
Sodium
C
Chlorine
D
Oxygen
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Guida verificata passo dopo passo1
Recall that the number of protons in an atom's nucleus defines the element's atomic number.
Identify the atomic number given in the problem, which is 17 protons.
Use the periodic table to find the element with atomic number 17.
Recognize that the element with atomic number 17 is Chlorine (Cl).
Confirm that the other options (Potassium, Sodium, Oxygen) have different atomic numbers: Potassium (19), Sodium (11), Oxygen (8).
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