Multiple Choice
Which of the following best describes how the chemical symbol of an element is determined?
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- 1. Intro to General Chemistry3h 29m
- Physical & Chemical Changes19m
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- 2. Atoms & Elements4h 16m
- The Atom9m
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- Atomic Mass28m
- Periodic Table: Classifications11m
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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
- Naming Alkenes11m
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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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- Main Group Elements: Density11m
- Main Group Elements: Periodic Trends7m
- The Electron Configuration Review16m
- Periodic Table Charges Review20m
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- Production of Hydrogen8m
- Group 1A and 2A Reactions7m
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- Boron Family: Borane7m
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- Nitrogen Family Reactions12m
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- Noble Gas Compounds3m
- 24. Transition Metals and Coordination Compounds3h 16m
- 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 Complexes15m
- 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
Struggling with General Chemistry?
Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
What is the atomic number of the element with the symbol Ca?
A
12
B
20
C
40
D
17
Verified step by step guidance1
Identify the element symbol given in the problem, which is Ca.
Recall that the atomic number of an element corresponds to the number of protons in its nucleus and is unique to each element.
Use the periodic table to find the element with the symbol Ca, which stands for Calcium.
Locate Calcium on the periodic table and note its atomic number, which is the number usually found above the element symbol.
Confirm that the atomic number of Calcium (Ca) is 20, meaning it has 20 protons.
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