Multiple Choice
Which of the following is the atomic number of chlorine?
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- 1. Intro to General Chemistry3h 46m
- Classification of Matter18m
- Physical & Chemical Changes19m
- Chemical Properties7m
- Physical Properties5m
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- 2. Atoms & Elements4h 17m
- The Atom9m
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- Intro to Hydrocarbons16m
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- Chirality15m
- Functional Groups in Chemistry11m
- Naming Alkanes4m
- The Alkyl Groups9m
- Naming Alkanes with Substituents13m
- Naming Cyclic Alkanes6m
- Naming Other Substituents8m
- Naming Alcohols11m
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- Alkane Reactions7m
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- 23. Chemistry of the Nonmetals2h 39m
- Main Group Elements: Bonding Types4m
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- The Electron Configuration Review16m
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- Nitrogen Family Reactions12m
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- Noble Gas Compounds3m
- 24. Transition Metals and Coordination Compounds3h 19m
- Atomic Radius & Density of Transition Metals11m
- Electron Configurations of Transition Metals7m
- Electron Configurations of Transition Metals: Exceptions11m
- Paramagnetism and Diamagnetism10m
- Ligands10m
- Complex Ions5m
- Coordination Complexes7m
- Classification of Ligands11m
- Coordination Numbers & Geometry9m
- Naming Coordination Compounds22m
- Writing Formulas of Coordination Compounds8m
- Isomerism in Coordination Complexes17m
- Orientations of D Orbitals4m
- Intro to Crystal Field Theory10m
- Crystal Field Theory: Octahedral Complexes5m
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- Crystal Field Theory: Square Planar Complexes4m
- 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
Periodic Table: Element Symbols
Multiple Choice
Which element on the periodic table has 79 protons?
A
Mercury (Hg)
B
Platinum (Pt)
C
Silver (Ag)
D
Gold (Au)
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Verified step by step guidance1
Recall that the number of protons in an atom is called its atomic number, which uniquely identifies each element on the periodic table.
Look up the atomic numbers of the given elements: Mercury (Hg), Platinum (Pt), Silver (Ag), and Gold (Au).
Mercury (Hg) has an atomic number of 80, Platinum (Pt) has 78, Silver (Ag) has 47, and Gold (Au) has 79.
Since the element with 79 protons corresponds to the atomic number 79, identify which element matches this number.
Conclude that the element with 79 protons is Gold (Au), as it has the atomic number 79.
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